BIDDEFORD — Biddeford police are investigating another pharmacy robbery.

Shortly after 6:30 p.m. Monday, a man entered the Rite Aid on Alfred Street and threatened pharmacy workers with a weapon demanding Oxycontin, Deputy Chief Joanne Fisk said. The pharmacist gave him an undisclosed amount of the prescription drug and he fled on foot.

The man is described as a white, wearing black-rimmed sunglasses, a black hooded sweatshirt, black pants and black gloves. He is about 5-foot-6 and weighs 130 to 140 pounds. Fisk said no one was injured during the robbery.

This makes the second pharmacy robbery within a month at the same Rite Aid. Police are still investigating a robbery that occurred there the evening of Dec. 28.

The robbery prompted Biddeford Police to reach out to federal government, Fisk said. The U.S. Drug Enforcement Administration and the Bureau of Alcohol, Tobacco, Firearms and Explosives announced last week they could help southern Maine authorities investigating these crimes and prosecuting suspects. While these agencies have been alerted of the robbery, Fisk said she does not know at this time what their involvement will be investigating the crime.

Authorities are asking anyone with information to contact the police department at 282-5127.