Officers investigating violence following a Chelsea-Cardiff City football match have released pictures of more than 50 people they want to contact.
A "large-scale fight" took place near Chelsea's Stamford Bridge ground after the FA Cup game on 13 February.
Police said more than 200 people took part in the clash, with bricks and road cones used as missiles.
One officer suffered an injury to his face that needed surgery.
Police said in a statement: "As the final whistle blew, opposing supporters made their way to the Fulham Road close to the junction with Holmead Road.
"Tension between the two groups quickly escalated and police formed a line between the supporters in a bid to separate them.
"A number of Cardiff supporters broke off from the main group and cut down an alleyway onto the Kings Road, where they were met by a group of Chelsea fans.
"Over 200 people took part in a fight on the Kings Road - missiles including road cones and bricks were thrown."
A number of police officers were injured.
Police have now released pictures of more than 50 people they want to speak to as part of the investigation.
More than 100 Chelsea supporters had also gathered before the game, leading to clashes with Cardiff fans who arrived on coaches.
'Fear of violence'
Police said there was trouble in the Fulham Road area with smoke bombs being let off.
Det Supt William Lyle said: "Over 40,000 law abiding fans attended this event to support their teams and enjoy a day of good football.
"Unfortunately they saw a brief glimpse of the type of violence we have worked hard to prevent in recent years.
"We are committed to keeping football a safe environment where people are able to take their families without fear of violence.
"If anyone recognises someone in the pictures I would urge them to call police."
Metropolitan Police set up an investigation team called Operation Ternhill to identify and arrest those involved.
Police say 30 people have been charged with various offences of affray and violence under the Public Order Act in relation to the disorder.
The FA Cup fifth round match, which Chelsea won 4-1, had kicked off early at 1200 GMT.
Anyone with information about those pictured or the incidents generally is urged to contact police on 020 8246 2712 or independent charity Crimestoppers anonymously on 0800 555 111.