Police are appealing for witnesses following the robbery of a man at knifepoint in Navi Avenue, Bognor Regis, on Sunday (31 October).
It happened around 2.30pm after the victim got off his bike to fix a brake lead which had disconnected.
He was punched twice and threatened with a knife before the suspect stole a quantity of cash and medication.
He is described as white, about 6’, slim with short blonde hair worn in either a short pony tail or bun at back and was wearing a two tone green hooded top.
Officers investigating the incident are keen to hear from anyone who saw what happened, or who may have captured any CCTV or doorbell footage from the area.
Anyone with information which could help with our investigation is asked to report it online or call 101 quoting serial 1337 of 31/10.