Police are investigating an aggravated break and enter in Forster last night where a woman was confronted by a man armed with a knife.

About 9:30pm, Wednesday 10 September 2014, a 28-year-old woman was alone in her unit on South Street when she walked into the dining room and discovered a man inside the premises.

The man, who was armed with a knife, walked towards her and out the front door of the unit before fleeing the scene with an amount of cash and cigarettes.

The woman, who was not injured during the incident, later contacted police who attended the premises.

Detectives from Manning/Great Lakes Local Area Command are investigating the break-in and are looking for a man described as being of Caucasian appearance, 18-19 years old with a thin build and blond hair.

He was wearing a black hooded jumper with a white image on the front.

Police are urging anyone with information about this incident to call Crime Stoppers on 1800 333 000 or use the Crime Stoppers online reporting page: https://nsw.crimestoppers.com.au/ Information you provide will be treated in the strictest of confidence. We remind people they should not report crime information via our Facebook and Twitter pages.