Detectives are appealing for public information following an armed robbery in Wollongong overnight.

Just after 11.10pm (Monday 18 February 2019), three men armed with knives entered a service station on Crown Street, Wollongong.

The trio threatened an employee before stealing cash and fleeing the area.

They were last seen heading toward Woodlawn Avenue.

Officers from Wollongong Police District were contacted and with assistance from the Dog Unit, conducted an extensive search of the area, however the men were not located.

A crime scene was established, and police are appealing for anyone with information, or who may have dashcam footage from the area, to come forward.

The men have been described as wearing a red-hooded jumper, a dark-blue hooded-jumper and a light-blue hooded jumper. All three had their face and hands covered.

Inquiries are continuing.