Police in Guelph are searching for a man who was caught masturbating on a city bus Thursday night. Police say a woman made the report just before 11 p.m. She said she was on the bus heading downtown when she saw a man sitting at the back take out and touch his penis while looking around. The suspect is described as a brown man, around 20 years old, with black hair. He was wearing a black quarter-zip sweater, a white t-shirt, dark pants and black running shoes at the time of the incident. Anyone with information is urged to contact Const. Danielle Driscoll at 519-824-1212 ext. 7565, or Crime Stoppers.