An 18-year-old man has died following a "disturbance" outside a Royal British Legion club.
Eddie O'Rourke, from The Clough, Runcorn, died in hospital after being found with a "serious injury" in Halton Village at about 20:30 BST on Friday.
Three boys from Runcorn, aged 15, 16, and 17, have been arrested on suspicion of murder, Cheshire Police said.
Officers have appealed for information and said the attack was believed to be an "isolated" incident.
Det Insp Adam Waller said: "Local officers remain in the area to provide reassurance to the community and anyone with any issues or concerns is urged to speak to them."
He said he was keen to hear from anyone who was driving along Main Street or Castle Road around the time the victim was injured.