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  1. Two people die in blast at Celsa Steel UK in Cardiff
  2. Five people injured
  3. Four of the casualties treated at University Hospital of Wales
  4. Health and Safety Executive assisting police with investigation
  5. Emergency services were called at 10:30 GMT on Wednesday

Live Reporting

All times stated are UK

  1. End of coverage

    That brings an end to the live coverage of the explosion at Celsa Steel UK in Cardiff.

    For the latest information and updates, see here.

  2. 'This cannot happen again'

    Roy Rickhuss, general secretary of the steelworkers' union Community, said: "This is absolutely tragic news and our immediate thoughts are with the families and colleagues of those who died and those who were injured.

    "Lessons will need to be learnt from what happened so that this cannot happen again but for today we should be focused on supporting everybody affected."

  3. Ambulance response

    Chris Sims from the Welsh Ambulance Service NHS Trust said there was a "thorough and robust" response to the explosion by emergency services.

    He added: "The Welsh Ambulance Service's thoughts are with everyone affected by the incident."

    Chris Sims
  4. 'Extremely difficult'

    Ian Greenman from South Wales Fire and Rescue Service described the fire as "an extremely difficult and arduous incident involving an explosion in the basement".

    "Crews worked tirelessly to effect rescues and deal with the fire. Despite heroic attempts, unfortunately we were unable to save two on-site personnel," he added.

    Ian Greenman
  5. Police statement

    Supt Stephen Jones of South Wales Police told a press conference at Celsa: "Two members of staff were unaccounted for and sadly I can confirm that we have found two bodies.

    "We've informed the families and are continuing to support them at this difficult time.

    "Our priority at this moment in time is to recover the victims, support their families and carry out an investigation to find out what's occurred here today."

    Emergency services at a press conference
  6. 'Devastating'

    Stephen Crabb
    Quote Message: This has been a truly devastating day for the families of the two Celsa employees who tragically lost their lives. I want to send my sincere condolences to them and to their colleagues at this extremely difficult time. Our thoughts are also with those who were injured. from Stephen Crabb Welsh Secretary
    Stephen CrabbWelsh Secretary
  7. 'Deeply saddened'

    First minister commends emergency services

    Carwyn Jones said: "I was deeply saddened to hear about the death of the two Celsa workers who tragically lost their lives today. Our thoughts go out to their families and friends at this very difficult time. 

    "I commend the work of the emergency services who responded quickly and professionally to deal with the emerging situation and hope those recovering in hospital make a full recovery."

    Carwyn Jones
  8. 'Truly Tragic'

    Councillor Phil Bale
    Quote Message: The news about the explosion at Celsa is truly tragic. My office overlooks the plant and when I heard the bang and saw smoke billowing out from the roof I immediately feared for the safety of people in the plant. Our thoughts and prayers are with all those affected and their families. from Phil Bale Cardiff council leader
    Phil BaleCardiff council leader
  9. 'Great sadness'

    Celsa UK statement

    "This morning at 10:30 there was an explosion at the rod and bar mill of our plant in Cardiff. 

    "It is with great sadness that we can confirm that two colleagues have passed away and four have sustained minor injuries. 

    "Our thoughts and deepest sympathies are with those affected and their families, who have been informed.

    "Our utmost priority is to support all of those involved and we are in close contact with the University Hospital of Wales, where the injured are being cared for. 

    "Operations have been suspended and the fire services have confirmed that the mill is safe."

    Celsa steel plant
  10. 'Two dead' in steel plant explosion

    Celsa UK confirms two people died in Splott blast

    Celsa steel plant in Splott
  11. Update in one hour

    South Wales Police said its update on the explosion will now be made at 17:30.

  12. Specialist search unit

    A specialist police search unit has arrived at the Celsa site. 

    Police earlier said two people were "unaccounted for" after the explosion at the steelworks. 

    A specialist police search unit at the Celsa site in Splott
  13. Numerous fire engines at scene

    Reports suggest up to 20 appliances were deployed to the Celsa site

    Firefighters at Celsa
  14. 'Difficult time'

    Carwyn Jones addresses assembly

    Quote Message: I'm sure all members will join me in expressing our concern and of course to join with me in sharing our thoughts with the employees and their families at this very worrying and difficult time. from Carwyn Jones First Minister
    Carwyn JonesFirst Minister
    Carwyn Jones, First Minister
  15. Explosion update

    South Wales Police is expected to make an updated statement on the Celsa explosion between 16:15 and 16:45.

    Celsa steelworks
  16. 'We're lucky'

    A worker at a nearby factory, who did not want to be named, said: "All we could hear was a big bang and the ground shook.

    "It seemed like someone had driven into the side of the building.

    "When we came outside you could see smoke coming from the top of the building.

    "We have contractors going in and out of there every day so we were lucky."

  17. Explosion felt half a mile away

    Charity boss heard bang

    The explosion was felt at the office of first aid charity St John Cymru Wales, which is about half a mile away from the plant. 

    Chief executive Keith Dunn said: "I was interviewing some staff this morning and we heard a loud bang. The building and the windows shook."

    The charity trains first-aiders at the Celsa plant. 

    Mr Dunn added: "Obviously our thoughts are with them and we will be making contact with the company to see if we can offer assistance."

    Fire engines at the Celsa steelworks
  18. Latest images from the scene

    Emergency services remain at Celsa's Splott plant

    Fire crews at the Celsa plant in Splott
    Fire engines at the Celsa plant in Splott
    Medics at the Celsa plant in Splott
  19. 'Major incident' stood down

    Cardiff and Vale University Health Board has stood down major incidents protocols which were initiated in the aftermath of the explosion.

    Chief operating officer Alice Casey said: "We have received four casualties from the incident and they are currently being assessed and treated by the trauma team at the emergency unit at University Hospital of Wales.

    "We would like to thank our staff for their professional and efficient response to this incident and our partners and the public for their support."

  20. A major employer

    Background on what Celsa does and how many people it employs in Wales.

    Sign outside Celsa steelworks
  21. 'No more casualties'

    Dr Graham Shortland

    Dr Graham Shortland, medical director at University Hospital of Wales, said: "We were called just before 11:00 GMT by the police who announced a major incident. 

    "Since then, we've been receiving casualties into the A&E. We have received four casualties. 

    "At present I'm advised that we will not be receiving any more at this time." 

  22. 'Cause of explosion'

    Rob Edwards, of the union Community, said he believed an oil accumulator in the basement of the building had exploded.

    Sign outside Celsa steelworks
  23. 'Thoughts with steel workers'

    Plaid shadow economy minister tweets

    Rhun ap Iorwerth
    Quote Message: My thoughts with Celsa Steel workers in Cardiff & their families after this morning's explosion. from Rhun ap Iorwerth Plaid Cymru AM
    Rhun ap IorwerthPlaid Cymru AM
  24. Concern over missing pair

    Rob Edwards, from Communityunion, said news two people were missing at the site was "a concern". 

    Rob Edwards from Community union
  25. Witness 'heard a rumble'

    Peter Sestanovich, who was nearby when the explosion happened, said: "We heard a big bang and a rumble through the floor and we saw black smoke billowing over the top of buildings."

    View more on twitter
  26. 'Quite a bang'

    Julie Hughes, a director at Stratum, which is opposite Celsa, said: "It was quite a bang. It sounded like something landing on our roof.

    "We saw the smoke. I was sat in reception seeing all the ambulances coming down the road. There are police lining up on East Moors Road."

  27. 'Two unaccounted for'

    Police say two people missing

    South Wales Police has said the fire at the steelworks has been extinguished and a "multi-agency operation" is ongoing to locate two people currently unaccounted for. 

    A spokesman said: "Five people were injured. Of these, one was treated and discharged at scene and four were taken to the University Hospital of Wales, Cardiff."

    Police at Celsa
  28. 'Like a car bomb'

    People had 'burning in back of throats'

    Lee Canning, director at a delivery firm on East Moors Road, near the Celsa site, said he heard an explosion at 10:40 GMT.

    He said: "It sounded like a car bomb, to be honest with you. 

    "It gave all premises a bit of a shake. Other than that it was fine. 

    "A few of our staff were out in Butetown, and they reported a burning sensation in the back of their throat."

    Police at Celsa site
  29. Four in hospital

    Cardiff's University Hospital of Wales said four people were being treated after being injured in the steelworks incident and no further casualties are expected.

  30. Smoke was 'billowing'

    BBC Wales' Natalie Crockett speaks to witnesses

    A woman, who works on the industrial site but did not want to be named, said she heard the explosion. 

    "I came out and could see the smoke, it was billowing from the building. 

    "I know a lot of people who work there. It's not nice seeing ambulances coming out.

    "Everybody just came out of the building after the explosion and was like, 'oh my God'." 

    An ambulance leaves Celsa
  31. Firefighters arrive

    More fire engines have arrived at the scene. There are believed to be more than 20 at the steelworks. 

    Fire engines arrive at the scene
  32. 'Supporting police'

    HSE issues statement

    The Health and Safety Executive said it has been made aware of the incident and an inspector is at the scene supporting police with inquiries.

  33. 'Ground shook'

    BBC Wales' Natalie Crockett speaks to witnesses

    Alan Cummins, a truck driver from Yorkshire, said: "I just pulled up went for a cup of tea and then I heard a bang. 

    "All the ground shook and the smoke came across the road. They stopped us going in. Police, ambulances and fire engines - the lot - started arriving."

  34. Celsa: Facts and figures

    A graphic about Celsa steelworks
  35. 'Very worrying'

    Quote Message: It's very worrying to learn of a serious explosion at Tremorfa Steelworks today. I visited the site just two weeks ago and was very grateful for the warmth of the welcome from workers. My thoughts are first and foremost with everyone involved and I would urge the public to heed the health board's advice and not present at the A&E unit in the Heath unless absolutely necessary. from Andrew RT Davies Leader of Welsh Conservatives
    Andrew RT DaviesLeader of Welsh Conservatives
    Andrew RT Davies
  36. 'Concerned'

    Quote Message: My thoughts are with the workers and families affected, along with the emergency services as they go about their work. Celsa is an important employer in Cardiff, and I know that hundreds of families will be concerned at today's news. from Leanne Wood Plaid Cymru leader
    Leanne WoodPlaid Cymru leader
    Leanne Wood
  37. 'Building shook'

  38. Air ambulance lands

    The Great Western Air Ambulance has landed at the nearby Willows High School.

    The Great Western Air Ambulance
  39. Location of Celsa site

    'Several' reported injured at Cardiff steelworks

    Cardiff map
  40. 'Extremely concerned'

    Union says incident was in bar and rod mill

    Steelworkers' union Community said it understands the incident was in the bar and rod mill on the site, not the actual plant.

    A spokesman added: "We are extremely concerned by reports of an explosion at the Celsa steel works in Cardiff. 

    "Our immediate thoughts are with the individuals affected and their families.

    "A member of our regional team is on his way to the site now to see what assistance we can offer and to seek further clarity on what has happened."

  41. 'Deeply concerned'

    Cardiff South and Penarth MP Stephen Doughty

    Stephen Doughty MP

    "I'm obviously deeply concerned to hear of the serious incident at Celsa steel in my constituency this morning. This news comes as a huge shock to the local community. 

    "I have spoken to senior management at the plant and clearly the situation is ongoing, with a number of reports of injuries. 

    "My thoughts are of course with the workers caught up in this incident and their families; and the emergency services responding at the scene. 

    Mr Doughty said he visited the site a fortnight ago. 

    "I have raised the matter with the Secretary of State for Wales this morning in the House of Commons and he has assured me that the authorities will do all they can to support the immediate operations and also any investigation."

  42. 'Our thoughts are with everyone'

    Quote Message: Details still coming in, but our thoughts are with everyone caught up in the incident at Celsa steelworks. I'm receiving regular updates. from Carwyn Jones First Minister
    Carwyn JonesFirst Minister
    Carwyn Jones
  43. Images from the scene

    Emergency services are at Celsa Steel UK in East Moors Road, Splott, Cardiff, where several people are said to have been injured.

    Celsa Steel site
    Celsa Steel site
  44. 'Major incidents'

    Other patients urged to think before attending hospital

    Non-emergency patients at Cardiff's University of Wales Hospital are being told there will be a delay as priority is given to those injured in the explosion.

    Alice Casey, chief operating officer for Cardiff and Vale University Hospital, said: "We have implemented our protocols for supporting major incidents and our teams are preparing to treat those injured.

    "We would ask the public to think carefully if they need to attend the unit and to make use of other health services."

    University Hospital of Wales
  45. 'The ceiling shook'

    Quote Message: I went outside and a PCSO said there's been a big explosion. That's all they could tell me. We heard this really loud bang. A colleague of mine, who was in the staff room, told me the ceiling shook. from Helen Vernon Busy Bee's
    Helen VernonBusy Bee's
  46. Ambulance statement

    Quote Message: We had a call at 10:39 this morning to an incident at Celsa Manufacturing on East Moors Road in Cardiff. We have two rapid response cars, two emergency ambulances, two high dependency service vehicles, the trust's hazardous area response team and the emergency medical retrieval and transfer service at the scene. from Spokesman Welsh Ambulance Service NHS Trust
    SpokesmanWelsh Ambulance Service NHS Trust
    An ambulance
  47. Loud explosion

    The reported explosion happened just after 10:30 GMT.

    People living and working nearby report hearing a loud explosion and a lot of thick black smoke