Police are trying to track down two suspects who are behind a string of armed robberies in Suffolk County.

Investigators say the two men have targeted gas stations and doughnut shops throughout Suffolk over the past few weeks. In each of the robberies, police say the suspects were armed with a black handgun and escaped with cash.

The most recent incident occurred at a gas station in Sayville on Jan. 8. Surveillance cameras rolled as a masked suspect brandished a gun and ordered the shaken clerk to put cash from the register into a black plastic bag. The clerk says the gunman also demanded the cash from his pockets.

According to investigators, many of the incidents involved a solitary male, described as standing at a medium to tall height. He typically covers his face with a ski mask and covers his hands with gloves. He has struck while dressed in a black jacket, black pants and a black hoodie. In earlier robberies, police say he was accompanied by a second masked male suspect with a shorter build, who wore a sweat suit.

Investigators say the suspect or suspects struck at locations on the following dates: Deer Park on Dec. 22, West Hills on Dec. 25, St. James on Dec. 26, Smithtown on Dec. 29, Commack on Dec. 29, Deer Park on Jan. 1, Huntington Station on Jan. 2, Holbook on Jan. 3, Bohemia on Jan. 5, Farmingville on Jan. 7, and Sayville on Jan. 8.

A $3,000 reward is being offered for information that leads to the suspects' arrests. Anyone with information is urged to call Crime Stoppers at 1-800-220-TIPS.