Two Central Oregon men died Friday afternoon in a head-on crash on Powell Butte Highway.

A 1994 Honda Accord driven by Richard Patterson, 21, of Bend, was headed southwest on the highway toward Bend about 4:45 p.m. when it drifted into the path of a 1996 Chevrolet Suburban driven by Ryan Reed, 35, of Prineville, according to the Deschutes County Sheriff’s Office. The vehicles collided head-on at milepost 10 near Pronghorn Resort.

Patterson was transported by Air Link to St. Charles Bend, where he was pronounced dead a short time later, the sheriff’s office said.

The right front passenger of the Suburban, Stephen Harnden, 65, of Prineville, was pronounced dead at the scene.

Reed and Joseph Harnden, 35, a passenger in the right rear of the Suburban, were taken by ambulance to St. Charles Bend with non-life threatening injuries.

Everyone in the Suburban was wearing seat belts and the air bag deployed on the driver’s side, the sheriff’s office said.

Patterson had been traveling with his tan pit bull, which was found dead inside the Honda. Patterson had been wearing his seat belt.

Police have not determined what caused the accident nor the vehicle speeds. The highway was straight where the accident occurred and it was nearly dark out, according to the sheriff’s office. The highway was closed for nearly four hours, and the crash remains under investigation.