In Broom Way at 9.15pm on Tuesday, March 20, a 15-year-old boy was threatened by a teenager who attempted to take his bike.
The victim cycled off unhurt.
Police are looking for a boy around the age of 16 or 17, with blonde hair who was wearing a navy blue jacket on the evening of the incident.
Anyone with any information is asked to call 101, quoting the crime reference number 44180104953.