Police are investigating an armed robbery at a service station fast food outlet at Greenacre this morning.
About 3am, two males wearing balaclavas and armed with knives entered the fast food section of the service station on Roberts Road.
The pair threatened two male employees and stole cash. They are believed to have then driven from the scene.
There were no customers inside at time and nobody was injured.
Police from Bankstown Local Area Command established a crime scene and officers from the Forensic Armed Robbery Unit are examining the area.
Investigators are interviewing the employees and will view CCTV from the service station.