A knife-wielding robber stole $45 from a man Monday morning in the 500-block of Potomac Avenue on the city’s West Side, Buffalo police said..

The man was approached about 10:15 a.m. by the robber, who displayed a knife and told him to give him everything, police said. The bandit was last seen running east on Potomac and south on Elmwood Avenue.

He was described as a male, about 20 to 25, 5-foot-11,150 pounds and wearing a red shirt, blue jeans, blue sneakers and a dark blue baseball cap.