A police hunt is underway for a man accused of sneaking up on and grabbing another man from behind in a dark alley in Mackay, before taking off with his bank card.

Detectives say the offender tried to steal the man's phone and wallet during the tussle on Wood Street, on November 30, at 1.15am.

But in a courageous act, a woman riding a bike interfered, confronting the offender who then dropped the items and only made off with a bank card.

No one was hurt in the incident.

Police have released two images of the man they want to speak to, and anyone with information is being asked to contact Crime Stoppers.

 

Images: Supplied QPS