POLICE are hunting a gang of around 13 youths who attacked a man and his step-son at Guiseley train station.

Officers say boys and girls aged between 15 and 18 were involved in the 'unprovoked' attack which happened at around 8.15pm on Friday, December 18 and which left the older man with a broken ankle.

The attack is believed to have begun after one of the boys in the group ran across the track and was warned of the dangers by the stepson, aged 23, from Bradford.

The rest of the group circled the young man and punched him to the ground. They then turned on his step-father when he tried to intervene.

Detective Constable David Bentley, of British Transport Police, appealed for witnesses to the attack.

He said: "This was a totally unprovoked and uncalled for attack which left the victim with a serious injury requiring hospital treatment.

"The victim and his son were only attempting to advise one of the member of the group about his dangerous actions and certainly shouldn’t have been subjected to this unacceptable and violent behaviour on the rail network and we are determined to find those responsible."