Two people died and a 15-year-old boy was hurt Saturday morning in a single-vehicle crash that prompted police to shut down the Wai­anae-bound lanes of H-1 freeway in Kapolei for more than three hours.

Police said a 21-year-old Waipahu woman was heading toward Waianae about 6:20 a.m. in a 2006 Dodge Ram pickup when she lost control near the Kualakai Parkway offramp, causing the pickup to climb the right shoulder and overturn.

Both the driver and a 27-year-old Waianae man who was riding in the truck died at the scene.

A 15-year-old Waipahu boy was taken to the Queen’s Medical Center in fair condition, police said.

They were the only people riding in the single-cab pickup. An Emergency Medical Services spokesman said the teen was the only one wearing a seat belt.

Police could not determine whether speed or alcohol were factors in the crash.

Police diverted westbound motorists off the H-1 at Kualakai Parkway during the investigation and reopened the freeway around 9:40 a.m.

The crash brought the number of traffic fatalities on Oahu up to 20 so far this year, compared with 16 at this time last year.