Glenn Warren, 74, killed, Barbara Warren, 72, critically injured, transported to hospital, after their pickup leaves the roadway on U.S. 169 near Nowata, and crashes into a tree.

An Oklahoma man died Friday after the pickup he was driving left the highway and hit a tree.

Glenn Warren, 74, of Nowata, was driving south about 9 a.m. on U.S. 169 in Rogers County when his pickup left the highway to the right and hit a tree, the Oklahoma Highway Patrol reported. He was pronounced dead at the scene.

Barbara Warren, 72, of Nowata, was taken to a Tulsa hospital in critical condition.

Glenn Warren was not wearing his seat belt, but Barbara Warren was, the patrol reported. The cause of the accident is under investigation.

UPDATE: Barbara Warren died as a result of her injuries. 04/26/14.