Detectives in Luton are keen to trace a Good Samaritan who helped a teenager when he was robbed on Friday.
The victim, 15, was robbed by two youths on BMX bikes as he made his way to school at 8.20am. When he tried to retrieve his phone he was punched in the face.
Two motorists stopped to help the victim and one of them returned the phone to the victim before taking him to school.
This motorist could be vital to the investigation. Call Det Con Rebecca Kitts on 01582 394443.