An 18-year-old Quincy man was killed in New Hampshire after his car struck a guardrail and flew off the road Friday morning, authorities said.

Lucien Theberge was driving a 2005 Toyota Sequoia north on Interstate 93 in New Hampton, N.H., when the car crashed about 6:30 a.m., according to a statement from New Hampshire State Police.

When police arrived, the Toyota was about 40 feet down a steep embankment among several trees, the statement said. Officials believe Theberge made an abrupt turn before the vehicle hit the guardrail and flew into the air, the statement said. He was pronounced dead at the scene.