A Waterford West service station was robbed overnight by a man armed with a knife.
Shortly after midnight the armed man entered the Kingston Road business making demands for money.
The store attendant complied handing over a sum of cash before the man fled on foot.
No one was physically injured during the incident.
The man is described as Caucasian in appearance, about 165cm tall, 20 to 30-years-old and with a proportionate build. He was wearing blue pants, a black jacket and a black cap.
Police investigations are continuing.