The FBI has issued an arrest warrant for a 66-year-old Augusta man in connection with a bank robbery in Hallowell on June 23.

John Cecil Slater allegedly robbed the Hallowell branch of the Bank of Maine at 10:15 a.m.

Slater was sentenced to five years in federal prison in 2000 for being a felon in possession of a firearm.

The robber entered the bank wearing a brown suit and a straw hat, threatened a teller, and made off with an undisclosed amount of cash, according to a news release from the FBI.

An arrest warrant was issued by the U.S. District Court for Maine on Friday. The bureau asks for the public’s help in finding Slater but says he is to be considered armed and dangerous, even though he did not show a weapon during the bank robbery.

Slater is described as 5 feet 11 inches tall, weighing about 200 pounds, with brown hair and hazel eyes. He has tattoos on both arms and a left hand deformity from a previous injury, the FBI said.

Anyone with information is asked to contact the FBI’s Boston division at 617-742-5533 or the Maine State Police, Hallowell police or Augusta police.