BY LAUREN FREEMANTLE

Police are asking for our help to identify an armed robber who held up the United Service Station on Patrick Street, Merewether this morning.

The incident occurred just after 7:30 as the man entered the store, armed with a knife.

He threatened staff before fleeing with cash and cigarettes.

Senior Constable Sue Thompson said the man is described as caucasian, around 180 centimetres tall, and was wearing a hooded jumper and dark coloured pants.

Anyone who sees him should contact Crime Stoppers on 1800 333 000.