A teenager was rushed to hospital after being stabbed by a gang of men in a “targeted” attack following a party in east London.
The 16-year-old left the gathering in Buckingham Road, Stratford, with his friends before they were ambushed.
The victim was punched and kicked after falling to the ground in nearby Cruikshank Road, as they approached Gurney Road.
He managed to get up and run away, only for his attackers to catch up and continue the assault.
The suspects ran off towards Bramall Close following the incident that happened at about 12.10am on February 18.
The victim staggered to Hayworth Road where he was assisted by two people who called an ambulance.
London Ambulance Service rushed the teenager to an east London hospital. He was discharged the following day.
No one else was injured, police say.
The victim was targeted because his attackers believed he was from another postcode, Scotland Yard said.
DC Mark Taylor of Newham CID said: "This violent attack on this young victim was totally unprovoked, and could have had graver consequences.
“It appears that the victim was targeted because the attackers believed he was from outside the area.
"We would urge anybody who knows something that could help us trace the attackers to speak to us.
“Any information passed to us would be treated in the strictest confidence."
If you have any information that could assist police with their enquiries, please call Newham CID on 02082 175 820.
Alternatively, tweet @MetCC or call Crimestoppers on 0800 555 111 if you would prefer to remain anonymous.