A third person has died of injuries suffered more than a week ago in a fiery head-on collision near Drumright.

The Oklahoma Highway Patrol says 20-year-old Blakely Dale Parson died Monday morning at a Tulsa hospital.

The crash occurred about 8:15 p.m. July 23 on Oklahoma Highway 33 in Creek County.

7/24/2009 Related story: Investigation Ongoing Into Deadly Drumright Wreck

Troopers say Parson was driving eastbound and left of center when he met a westbound car driven by 52-year-old Billy Ray Semler. Investigator say Semler swerved to the right while Parson swerved left and the cars met head-on with Parson's car catching fire.

Also killed in the collision was 51-year-old Betty Semler while another passenger in the Semler car was seriously injured.