POLICE have released an image of the suspect in the armed robbery of a Muswellbrook shop on Tuesday.

The man entered the Bridge Street shop about 7pm and threatened a 19-year-old female employee with a knife before demanding money.

He fled with some items.

He was described as being of Caucasian appearance and 170cm to 175cm tall.

He is shown wearing a grey hooded jumper and blue tracksuit pants with white stripes down both legs.

Anyone with any information is urged to contact Crime Stoppers on 1800 333 000 or Hunter Valley detectives on 6542 6999.

– Image courtesy of NSW Police