An investigation has begun following the assault of a 15-year-old boy at a shop in Lancing.
The boy was riding his bike near the railway station at around 7pm last Saturday (July 10) when a group of around ten other teenage boys began shouting at him.
He was chased by the group and ran into a Co-Op store on North Road where he alerted a security guard and called 999.
Two boys, aged about 15 or 16, followed him into the shop, and one of them punched him in the face, causing a minor injury.
Officers attended the area but the group had left the scene.
The victim does not live in the area and did not know or recognise anyone from the group, but gave a description of the suspect who punched him.
The suspect is described as white, aged about 16, with blond slicked back hair, and wore a navy blue jumper with a white Nike logo across the chest, with grey tracksuit bottoms and white trainers.
Sussex Police are appealing for witnesses and have issued a CCTV image in connection with the incident.
Anyone with any information is asked to contact police online or by calling 101, quoting serial 1171 of 10/07.