Two Utahns were killed Friday in separate auto accidents.

Dead: Suphalak Brethold, 22, of Ogden.

Lois J. Nelson, 50, of Dugway, Tooele County.

Brethold, a Weber State College student, was killed about 8:30 p.m. in a two-car accident on Riverdale Road, police said.

He was riding in a car driven by Holly Holmes, 21, of Ogden Valley.

According to the accident report, Holmes' eastbound car apparently went out of control and collided with a station wagon driven by Sanoma Burke, 39, of Ogden.

Police Sgt. Mike Daily said the Holmes' car had just passed another vehicle when it veered into the path of the station wagon.

Holmes suffered facial cuts and Burke a broken leg. Both were admitted to St. Benedict's Hospital and were in satisfactory condition Saturday, a spokeswoman said.

Lois Nelson was killed about 7 p.m. in a single-vehicle accident on Skull Valley road about 10 miles south of the I-80 interchange.

Dugway information officer Carol Fruik said the woman died instantly when the U.S. Army ambulance she was riding in left the highway and hit a utility pole. The ambulance crew was transporting her and her granddaughter - Amanda Nelson, age 12 - to Primary Children's Medical Center in Salt Lake City.

The child had suffered head injuries as a result of a bicycle accident earlier in the day but did not receive any injuries as a result of the ambulance accident.

Other occupants of the vehicle escaped injury. They are the driver, Pfc. Vernon Barnett, and two emergency medical technicians - Pfc. Allen Beiser and Sgt. Raymond Overby III. Amanda Nelson was transported by another emergency vehicle to Primary Children's Medical Center, where she was held overnight for observation and released Saturday morning.

The Tooele County Sheriff's office, Utah Highway Patrol and military police responded to the accident. An investigation is under way to determine the cause.