CASCO – A Massachusetts man died Friday after falling through the ice on Sebago Lake, the Cumberland County Sheriff’s Department said.

Karl Mattson, 60, of Foxboro, Mass., crashed through thin ice about 10 feet from shore around 10:30 a.m. Mattson had run out to help a dog that had fallen through the ice.

Mattson was under water for about 35 minutes before rescue workers found him.

He was pronounced dead at Maine Medical Center in Portland.

The dog survived.