Police investigating a fatal stabbing in Bristol say an international hunt has begun for a man wanted in connection with the inquiry.
Abdirisak Mohamoud, 18, died in hospital after the attack in Villiers Road, Easton, on 8 July.
Detectives are searching for 20-year-old Kemar Campbell, who left the UK just days after the stabbing.
Police said they were keen to speak to the Jamaican national, who may be using the name of Michael Campbell.
Several arrests have already been made in connection with the attack but police have not been able to track down Mr Campbell, who is also known as "Yardie".
Police said he travelled to France, taking the Dover to Calais crossing, on 10 July, but his movements since then are unknown.
Mr Mohamoud's mother, Zahra Ahmed, said: "This has been a devastating time for the whole family.
"Please, if you know anything, help the police by coming forward and reporting it."
A 19-year-old man arrested on suspicion of murder remains on bail, along with four others who have been arrested on suspicion of assisting an offender.