West Midlands Police (WMP) says it has arrested three more people overnight in the investigation into the murder of Keon Lincoln.
Keon died at the age of 15 after suffering gunshot and stab wounds in an attack believed to have been carried out by a group of young people in the Handsworth area of Birmingham on Thursday.
On Sunday, police announce the arrest of a 14-year-old boy at his home in Birmingham.
Two other boys, aged 15 and 16, were later arrested at another address in Walsall in the early hours of Sunday morning.
All three are being held on suspicion of murder.
WMP said detectives had been granted more time to question a 14-year-old who was arrested on Friday morning.
Another 14-year-old who was arrested later on Friday evening has been released under investigation.
“There has been no let-up in our quest to find those responsible for Keon’s murder and these are significant arrests," Detective Chief Inspector Alastair Orencas, who is leading the investigation, said in a statement.
“We are gathering a substantial amount of evidence which will take time to analyse, but we must be thorough to get justice for Keon’s family," he said, adding: "They have been fully updated with the latest developments.”
Keon’s family have described the teenager as a "fun-loving" person who had “an infectious laugh that lit up the room whenever he was in it”, according to Sky News.
The West Midlands police are asking anyone with information on his death to come forward, no matter how insignificant the details might seem.
“Let us decide if it is relevant,” they have said.
Anyone with information should contact police via live chat on WMP’s website or by calling 101. Alternatively, call Crimestoppers anonymously on 0800 555 111.