Police are still hunting the killers of teenage army cadet Joseph Lappin.
The 16-year-old, of Old Swan, Liverpool, was knifed in the heart outside a youth club after being chased by a gang.
Five people questioned on suspicion of his murder were released on bail on Friday.
A 16-year-old youth from Kirkdale, a 20-year-old man from the Vauxhall area, a 19-year-old man from the Kirkdale area and two youths aged 14 and 15 were held in connection with his death.
The senior officer leading the investigation, Det Supt Steve Naylor, said: "Inquiries are ongoing into Joseph's murder and I would like to thank the local community for the information that they have given to the inquiry team.
"I would ask that they continue to talk to officers and would encourage anyone who has not come forward to do so."
Joseph was attacked with two friends outside the Shrewsbury House Youth Club in Everton on Monday night.
Callum Naden, 17, was stabbed twice during the incident and police said he was lucky to be alive. The other boy sustained minor injuries.
Joseph's parents, John, 45, and Toni, 44, made an emotional plea for the killers to be turned in earlier this week.
Detectives are continuing to study CCTV footage to discover the movements of the gang of up to 15 youths in the moments before and after the stabbings. It was Joseph's first visit to the club where he had gone to support a friend who was playing in a band.
