Police have released a sketch of the suspect wanted in the reported sex assault of a 12-year-old boy at the South Street Seaport Tuesday. 

The Staten Island boy, who was spending the day with his grandmother at the seaport, told authorities he was sexually assaulted in a bathroom near the pier shops Tuesday evening, police said.

The boy told police he went to use the bathroom as he and his grandmother got ready to leave the pier; he said a man pulled him into the one of the stalls and performed a sexual act on him, police said.

Once he was back outside, the child told his grandmother that he was "raped in the bathroom," police sources said, and investigators were called to the seaport.

The suspect may be in his 30s to mid-40s, police say. Anyone with information is asked to contact Crime Stoppers at 800-577-TIPS or at nypdcrimestoppers.com.