Detectives investigating the murder of a man in Bow continue to appeal for witnesses.
Police were called at approximately 02:30hrs on Saturday, 30 September to reports of a disturbance in Ropery Street, E3.
Officers attended and found a 21-year-old man suffering from stab injuries in nearby Eric Street. He was treated at the scene by London's Air Ambulance before being taken to an east London hospital where he died at 04:52hrs.
His next of kin have been informed. Formal identification is yet to take place.
A post-mortem examination will be held in due course.
The victim, from the Mitcham area of south London, had attended a party at an address in Ropery Street. While at that party a disturbance occurred involving a number of people. This spilled out into the street where the victim was stabbed.
Detective Chief Inspector Andrew Packer from the Homicide and Major Crime Command leads the investigation. He said:
"Our enquiries so far have established there was a large group of young people from east and south London who attended this party and I need to trace as many people as possible to piece together the events that led to this murder.
"The stabbing occurred in the street and would have been clearly visible to passers-by and residents who may have been disturbed by the noise of the fight.
"This was a brutal attack that has taken a man's life and I am urging anyone with information to come forward and speak to police."
Anyone with information is asked to call the incident room on 020 8345 3865 or contact Crimestoppers anonymously on 0800 555 111.
There have been no arrests. Enquiries continue.