About 11.50am (October 12) a 19-year-old man was sitting on a seat in the park on Graham Street, when he was approached by three men.

One of the men, described as Aboriginal in appearance, aged in his 30s, with a skinny build, a patchy moustache, and wearing a fluorescent yellow singlet, blue work shorts and black orange Nike shoes, approached the young man and produced a knife.

He demanded money from the 19-year-old, while the two other men sat next to the victim.

The trio stole an amount of cash before running from the area.

The 19-year-old was not hurt during the incident, and has given police a description of the two other men involved.

The first man has been described as being about 165cm tall with dark skin and scruffy shoulder length grey hair and a long beard, with distinctive lines around his mouth.

The second man was of Middle Eastern or Mediterranean appearance, with a chubby build, about 160cm tall with a black crew cut.     

Police from Shoalhaven Local Area Command are investigating the robbery and would like to speak with anyone who may have information.

Witnesses can call Nowra Police on 4421 9699 or Crime Stoppers on 1800 333000.