A teenage boy was taken to hospital after being hit on the back of the head with an unknown weapon.

Between 8pn and 9pm on Halloween, a 15 year old boy and three of his friends were involved in a fight with another larger group in Moatfield Recreation Ground, in Bournehall Lane, Bushey.

The boy was punched in the face by one of the group before being hit on the back of the head with an unknown weapon.

PC Stuart Keene said: "This was an unprovoked attack which left the victim with a skull fracture and he needed surgery to remove a small piece of metal from his head.

"Thankfully the teenager is expected to make a full recovery and has been discharged from hospital."

Anyone with information should contact Hertfordshire Constabulary on 101.