Barnstable police Sgt. Thomas Toomey said William Kaouette, 55, looked out from the window of his apartment about 3 a.m. Monday and spotted a business owner using a snow blower in a nearby parking lot, WCVB-TV, Boston, reported Monday.
Kaouette shouted out the window at the man that snow was being blown onto his car and rushed outside with a shovel, police said.
Toomey said Kaouette told the man he wanted to help him remove snow, but then attacked the business owner with his shovel.
The victim declined medical treatment at the scene, Toomey said.
Toomey said Kaouette was arrested and is scheduled to be arraigned Tuesday.