A Massachusetts man was killed in a single-car crash on Interstate 95 in Wells Sunday morning, according to Maine State Police.

Kevin P. Mahoney, 22, of Dracut, Mass., was driving south on the highway in a black 2008 Buick LaCrosse near mile marker 18.5 at about 8 a.m. when he went off the right side of the highway, police said.

His car then hit a tree, and police said he was pronounced dead at the scene. Police said he was alone in the car, and no other vehicles were involved.

Police said the investigation is ongoing, but “speed appears to be a contributing factor.”