Portland police are looking for a knife-wielding robber who took an undisclosed amount of cash from another man in the Old Port on Friday at 4 p.m.

The victim suffered a minor cut from the knife, police said.

The man had just withdrawn money from a TD Bank ATM on Union Street when he was approached by a black male in his 30s, wearing a white tank top and blue pants, police said.

Police declined to offer more specific information on the victim’s injury, but said he was treated at the scene for the wound. Anyone with information is asked to call police at 874-8575.