Police are investigating four armed robberies that happened this week in Portland and three surrounding communities.

No one has been injured in any of the robberies, and no arrests have been made.

The Irving station at 174 Main St. in Cumberland was robbed Thursday.

The latest robbery was reported Thursday night in Cumberland, where police said someone robbed the Irving gas station at 174 Main St. around 8:44 p.m. No more details were available late Thursday night.

In Falmouth, police were searching for a man who entered the Lil’ Mart store on Route 1 shortly after 8 p.m. Wednesday, displayed a handgun and fled with an undisclosed amount of cash. Police described the robber as white, wearing a gray hooded sweatshirt, a facemask and black gloves.

Earlier Thursday, a white man entered the Good Things Variety store on Saco Street in Westbrook just before 1 p.m. and displayed a handgun, robbing the store before running away.

Police used a dog to track the suspect, but did not find him. The suspect is about 5 feet 8 inches tall, with a skinny to medium build, and was wearing a blue sweatshirt or fleece vest with yellow lettering. A mask covered his face and he was wearing sunglasses.

Police are still looking for the man who robbed the Riverton Gas Station in Porland on Tuesday.

Westbrook police Capt. Steven Goldberg issued a statement Thursday night saying, “Part of the investigation will include determining if this robbery is linked to the recent robberies in Portland and Falmouth.”

In Portland on Tuesday night, a man with a silver handgun entered the Riverton Gas Station at 1585 Forest Ave. and demanded cash. He was described as being about 30 years old, 5 feet 5 inches tall with a thin build. He was wearing a heavy dark jacket, a dark cap, dark gloves and a ski mask that covered half of his face.

Dennis Hoey can be contacted at 791-6365 or at:

dhoey@pressherald.com