ANCHORAGE, Alaska (AP) — Three motorcyclists killed in a crash that injured another rider on a key Alaska highway north of Anchorage have been identified.

Alaska State Troopers spokesman Tim DeSpain says four motorcyclists struck a vehicle on the Glenn Highway that had been pushed into their lane Saturday night.

Three were pronounced dead at the scene. Troopers identified them as 53-year-old James Carlyle, 48-year-old Sabrina Carlyle, and 63-year-old Elaine Loew. The relationship between the riders wasn't immediately known.

The injured motorcyclist was hospitalized, but condition information wasn't immediately available.

DeSpain says the crash occurred when a Ford F-250 stopped to make a turn but was rear-ended by a Chevrolet van and pushed into the oncoming lane. All four oncoming motorcyclists then collided with the truck. No one else was seriously hurt.