Two men stole a watch at knifepoint on Friday night in Conniburrow.
The incident happened at around 11.30pm as the victim walked in the grass area between Bryony Place and Marjoram Place.
He noticed two men stood on the path in front of him and as he walked towards them one of them threatened him with a knife and told the victim to stand still.
The second offender then stole the victim’s watch and both offenders ran towards Marjoram Place.
The first offender was black, aged between 19 and 20, 6ft tall, of slim build. He wore a black puffa jacket with the hood up, and tracksuit bottoms.
The second offender was black with a lighter complexion, aged between 19 and 20 years old, 5ft 6ins tall, skinny, and wearing straight black hair.
Anyone with information is asked to call Thames Valley on 101.
Alternatively call Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org