Three boys aged 14 and two others who are 13 were arrested on suspicion of murder after a man was stabbed in north London.
The 52-year-old victim was attacked apparently during an argument with a group of youngsters as he tried to get into a block of flats where he lived in Edmonton on Sunday night.
Police say the victim – who was with a woman – continued into the block but was followed by two of the boys and he was then stabbed.
The youngsters did not know the man, who died at the scene shortly before 8.40pm.
Of the boys arrested, the three 14-year-olds and one 13-year-old were bailed and must return to an east London police station on a date in late January pending further enquiries.
The second 13-year-old remains in custody at an east London police station.
Detective Chief Inspector Neale Baldock said: “Our initial enquiries have established that there was a supervised party taking place at another address within the block and the group of males were trying to gain access to this.
“The victim and this group were not known to each other – what started as a minor verbal altercation has escalated into a shocking act of violence.”
Sky Crime Correspondent Martin Brunt said: “There is a good deal of police activity at the scene, much of it focused on talking to people that live in this block of flats.
“They’re trying to establish how what appears to have been an altercation turned into such a drama.”