PELHAM — A town police officer and a Massachusetts woman were hurt in an accident involving an unmarked Pelham police cruiser and two other vehicles Friday afternoon.

The accident happened at about 1:34 p.m. at the intersection of Route 111-A, Nashua Road and Main Street. Nashua Road becomes Main Street after it crosses the intersection.

Police say the unmarked Chevrolet Impala police car was stopped at a stop sign at the end of Main Street just before the intersection. A Ford Escape entered the intersection after failed to heed a stop sign at the end of Nashua Road and collided with a Cadillac headed north on Route 111-A. The force of the crash caused the Escape to flip over onto the hood of the cruiser.

Pelham Police Lt. Brian McCarthy, 47, the driver of the cruiser, and Karen Cimino, 32, of Groveland, Mass., who was driving the Escape, were taken for hospital treatment of non-life-threatening injuries.

The driver of the Cadillac was identified as Shelia Elliott, 75, of Pelham.

No citations were issued at the time of the accident and investigation by State and Pelham police is continuing.