Boston police are searching for a man with “large ears” who allegedly robbed a bank in Back Bay this afternoon.

The man entered the Eastern Bank branch at 155 Dartmouth St. at about 2:45 p.m. and demanded money. Police said he did not show a weapon. They did not say how much money he left with.

The man was wearing a gray hooded sweatshirt and a baseball hat. But police said his large ears were visible.