A school boy has suffered a suspected broken jaw after being struck in the face with a tree branch in a park by a gang of boys who robbed his bike.
The victim, aged 16, was among a group of six teenage friends who were in Haslam Park, off Blackpool Road, Ashton, Preston, when another group of around six youths approached them on Monday night.
The thugs then robbed mountain bikes from four of the boys.
Another hit one of them with a heavy branch that had blown off in high winds that hit the county on Monday.
One of the robbers had a white Staffordshire bull terrier.
The youngsters managed to call police at around 9.20pm on Monday.
A short time later, three youths aged 13, 16, and 15 were arrested on suspicion of robbery.
They are now being quizzed by detectives at Preston police station.
Today, Det Insp Keith Lee, of Preston Police, said: “Due to the actions of the parents of the youths who were victims, we managed to make swift arrests in connection with the robbery.
“Officers are currently checking CCTV from the local area to help identify other people who are responsible.”
Anyone with information about the robbery can call 101 or Crimestoppers on 0800 555111.