Police are seeking help tracking down a sexual assault suspect.

Between 2:30 a.m and 5:30 a.m. on Monday, police say an unknown male sexually assaulted another male in the parking lot in the area of Robinson St. and Fallsview Blvd. in Niagara Falls.

The suspect is described as a 30 to 40-year-old white male with a thin build and blonde hair (possibly in a pony tail) and a goatee. Police say he was riding a bicycle.

Police are asking any witnesses or anyone who has any information regarding the incident to contact Jeff Bootsma, a detective constable with the Sexual Assault Unit, at 905-688-4111 ext. 9283.