A Shoreham man was attacked at a Churchill Square bus stop on Saturday morning.
At 1am the 18-year-old was waiting at the bus stop when he was approached by a group of young men who stole his phone.
He was then assaulted by them and was punched repeatedly to the face and suffered a broken jaw.
Detective constable Paul Candy said: “The offenders are described as a group of three or four skinny boys aged between 14 and 16-years-old and wearing hooded tops.
“Churchill Square is a busy area at that time of the early morning on a Saturday and I am hoping that somebody has seen what happened and may be able to give us more detail, or identify the offenders.
“Anyone with information is asked to contact police on 101 or email email@example.com quoting serial 105 of 7/12. Alternatively contact the independent charity Crimestoppers anonymously on 0800 555 111.”