Griswold _ A Jewett City man was killed Sunday afternoon when his car collided with a tree on Hopeville Road, also known as Route 201.

State Police said David Mack, 55, of 1531 Glasgo Road was driving his Mazda Miata north on Hopeville Road prior to the intersection with Lestor Road just before 1 p.m. when he crossed the double yellow line into the southbound lane and hit a guardrail. The car then swerved back into the northbound lane, went onto the shoulder and then struck a tree.

Mack was pronounced dead at the scene. Police said a passenger in his car, Ben R. Mack, 17, of Lexington, Mass., suffered serious life threatening injuries and was taken to the William W. Backus Hospital. Anyone with information about the crash is asked to call state police at 860-848-6500.