The FBI's Bank Robbery Task Force reports it's looking for a man it says held up the Metro Credit Union branch at 1071 Massachusetts Ave. around 9:30 a.m. on Saturday.

He's described as white, about 5'4" and wearing a dark jacket, khaki pants, white sneakers with dark trim and a really tall knit hat.

He is also wanted for holding up a Santander Bank branch at 585 Columbia Rd. in Dorchester on Dec. 7 - while wearing wrap-around glasses and a shorter, but pointier, hat - but also wearing the same white sneakers with dark trim.

And he's wanted for holding up a Commerce Bank branch in the South End on Dec. 5, while wearing a scally cap - and those same sneakers.

If he looks familiar, contact the task force at 781-760-7077.