An 18-year-old Lawai man died in a one-car crash early Sunday morning in Kekaha, and his female passenger suffered serious injuries and was flown to The Queen's Medical Center on Oahu, Kauai police said.

The girl was in stable condition at Queen's.

According to a police report, Max Agor was east-bound on Kaumualii Highway near St. Theresa's Church at about 1:12 a.m. when he lost control of his Toyota pickup truck, went onto the east-bound shoulder and flipped over several times.

Agor and the girl were thrown from the vehicle and landed on boulders by the highway, police said.

Agor was pronounced dead at Kauai Veterans Memorial Hospital.

Speed and alcohol may have been factors, police said.