PLYMOUTH -- A gunman robbed Radio Shack Thursday night, ordering the store clerk to get on the floor before he ran out the door with an undisclosed amount of cash, according to the police chief.

Chief Stephen M Lefebvre said the robbery happened just after 8 p.m. at the Tenney Mountain Highway store. A white man, with a ski mask concealing his face, entered the store, pointed a black semi-automatic pistol at the clerk and demanded all the money.

Lefebvre said the robber ordered the employee to the floor and then ran out the door. Because the employee was on the floor, Lefebvre said he was unable to see if the robber got into a waiting car.

The robber is described as a 6-foot-2 white man, possibly having green eyes, and weighing about 200 pounds. He was dressed in black or dark-colored pants, a black or dark-colored Carhartt-style jacket, green winter hat and a black ski mask.

Police conducted extensive searches of the area and interviews in an attempt to identify additional witnesses or locate physical evidence.

There were no reported injuries.

Lefebvre said video surveillance of the incident is currently being analyzed and, therefore, unavailable for release at this time.

Anyone with information about the robbery is asked to call police at (603) 536-1804.