Police have begun a murder inquiry after the death of an 83-year-old man who was attacked in his home.
Ferozur Rahman, who lived alone, was found unconscious in his flat with severe head injuries on Friday.
Mr Rahman, last seen on Thursday, was taken to hospital by ambulance but died of his injuries on Saturday.
Detectives believe one or more suspects forced their way into the flat, in Bethnal Green, east London, and are appealing for witnesses.
Det Insp Larry Smith from the Metropolitan Police told the BBC: "Mr Rahman - an 83-year-old man - lived alone in his flat on the Colombia Estate and someone has broken into his house and assaulted him with such severity that he subsequently died of his injuries.
"As I say Mr Rahman's an elderly man and we're basically appealing for any witnesses who may have any information concerning this attack or anybody else who's got any information to come forward and contact us."
Mr Rahman was discovered with his injuries at 1410 GMT on Friday and was taken to the Royal London Hospital.
A post-mortem examination has yet to be arranged.
Any witnesses, or anyone with information that may assist police, should call Crimestoppers on 0800 555 111.
There have been no arrests and enquiries are continuing.