Robbers stole a teenager's bike.
The 18-year-old was riding his bike at around 9.20pm on January 6 in Stagelands towards Langley Green Parade, Crawley, when he was approached by four other men.
One of the suspects grabbed his bike and another man demanded his mobile phone, which he did not have on him. He was punched once in the face but didn't suffer any injuries.
Detective Constable Dan Richardson said: "The stolen bicycle is described as a red mountain bike made by Silver and has silver duck tape fixed to the front light bracket. The suspects are described as aged in their early teens, wearing tracksuits and hooded tops."
Call Sussex Police on 101.