The Lake Ronkonkoma TD Bank was robbed Tuesday afternoon, according to Suffolk Police.
Police say a man entered the bank, located at 474 Portion Road, demanded cash from a teller and threatened the use of a gun around 1:45 p.m.
The teller complied and the robber fled the bank on foot westbound on Portion Road, police said. The robber is described as about 5-foot-10 with a slim build. He was wearing a black mask and a yellow raincoat at the time of the robbery.
As Suffolk County Police Pattern Crime Unit detectives continue to investigate, detectives are asking anyone with information on the robbery to call anonymously to Crime Stoppers at 1-800-220-TIPS.
The Lake Ronkonkoma TD Bank was also robbed in November.