NEW DURHAM, N.H. — New Hampshire state police say a driver was pronounced dead at the scene and his passenger was airlifted to a Maine hospital after a head-on crash in New Durham.

Authorities say 21-year-old Christopher Riley of Abington, Massachusetts, was driving his pickup truck east on Route 11 when he crossed the centerline and crashed into a Ford Fusion about 9 a.m. Saturday.

Killed in the crash was 83-year-old Lynwood Carter of Dover. Police say his passenger – 80-year-old Sally Carter of Dover – was airlifted to Maine Medical Center in Portland with life-threatening injuries and remains in critical condition.

Police say Riley was transported by ambulance to Maine Med with serious but non-life-threatening injuries.

The accident remains under investigation. Police say it’s unclear why Riley crossed the centerline.