A female employee of a Narellan business was attacked just after midnight by a man armed with a knife.
The woman was walking back into the Camden Valley Way premises when she was grabbed from behind.
The assailant led the woman back inside the business at knife point.
There he threatened another staff member, who handed over cash before the man fled the scene.
Officers attached to Camden Local Area Command with assistance from NSW Police Force Dog Unit established a crime scene and conducted a canvass of the area.
Police have commenced an investigation into the incident and would like to speak to a man who might be able to assist with inquiries.
He was described as being of Caucasian appearance.
He is aged in his 20’s, is around 1.83cm tall, of thin build.
The man police looking for also had a short brown beard.
He was last seen wearing a long sleeved fluro orange hooded jumper.
Police are urging anyone with information to come forward and contact police.
If you have any information call Crime Stoppers on 1800 333 000.