WESTPORT - Westport police say they're investigating an armed robbery overnight at a convenience store.

Police say it happened at around 3:30 a.m. at the Merritt Country Store on Main Street.

Investigators say a white man around 5 feet 9 inches tall, wearing dark clothes, a black mask and large dark sunglasses came into the store armed with a black handgun. They say the night clerk handed over money and the suspect took off and was last seen running north on Main Street.

Police say they hoped surveillance video would get a clear view of the suspect, but the cameras didn't get that shot.