VALE, Oregon -

A Boise couple and a Paulina man were killed Sunday afternoon when an SUV and a pickup towing an empty cattle trailer collided head-on on Highway 26 about 30 miles northwest of Vale, Oregon State Police said Monday.

According to OSP Sgt. Mark Duncan, around 3:40 p.m. a 1999 Chevrolet sport utility vehicle driven by Courtney Glick-Peterson, 31, if Boise, Idaho, was eastbound and going downhill on Highway 26 near milepost 249, entering a right curve, when the SUV traveled into the westbound lane and collided with a westbound 2006 Dodge pickup, pulling an empty livestock trailer and driven by Eugene Albert, Bernard, 76, of Paulina.

Glick-Peterson and her husband/passenger, Zachary Edward Peterson, 26, were pronounced dead at the scene, Duncan said, adding that Peterson was not wearing his seat belt and was thrown from the SUV. Bernard also died at the scene, the sergeant said.

Seat belt use by both drivers was pending confirmation, as OSP troopers from the Ontario Area Command office are continuing the investigation.

OSP was assisted at the scene by the Malheur County Sheriff's Office, Brogan Quick Response Unit, Vale Fire & Ambulance and ODOT. The highway was closed for several hours during the scene investigation.