Police are hunting masked men who attacked two teenagers with baseball bats.
The incident happened as the 18-year-old men were locking up premises in Balmoral Avenue in Whitehead, Co Antrim, at about 8.30pm on Tuesday.
Both victims were taken to hospital for treatment to their injuries. One has since been discharged.
Police believe three suspects may have been involved in the attack.
Detective Sergeant Peter Crothers has appealed for anyone with information to contact the PSNI's Reactive and Organised Crime unit at Larne on 101, quoting reference 1237 04/10/16.