A 15-year-old boy from Wiltshire has been arrested on suspicion of murder.
The teenager is being questioned over the fatal stabbing of Mikey Roynon in Bath.
Detectives arrested the suspect in the county on Sunday evening (22 October).
16-year-old Mikey was knifed to death at a house party in Eastfield Avenue on 10 June.
A post-mortem examination has been carried out on the victim, who was also known as YM and from Kingswood, and confirmed that he died from a single stab wound.
“Mikey’s family have been updated on this development and continue to be supported by specially trained family liaison officers continue”, a spokesperson for Avon and Somerset Police said.
They added: “Two other teenagers, a 15-year-old boy from Dorset and a 16-year-old boy from Wiltshire have already been charged with Mikey’s murder (joint enterprise) and possession of an offensive weapon.
“They are next due to appear Bristol Crown Court on Tuesday 7 November.”