Halifax Regional Police are investigating an indecent act at the NSCC Waterfront Campus in Dartmouth.

Police say a man was seen masturbating in the atrium of the college around 7 p.m. Monday.

Security was notified, but the man had left the scene by the time they arrived.

The suspect is described as a white man in his early 20s with brown, medium-length hair. He is five-foot-five inches tall and weighs 130 to 150 pounds.

He was wearing a red shirt, green khaki pants, and was carrying a red backpack at the time of the incident.

Anyone with information about the incident is asked to contact police.