Two more people have been arrested following a fatal blaze at a former care home in Sunderland.
Patryk Mortimer, 39, died after being found unconscious in the building where he lived - previously Manor House Care Home in Easington Lane - on 3 November.
Six people have been arrested on suspicion of murder.
Police held a man, 34, and a woman, 36, on Friday and continue to question a 21-year-old man and another 36-year-old woman.
Two men, aged 23 and 35, arrested the day after the fire, have been released while investigations continue.