KELSEYVILLE, Calif. – A Kelseyville man died in a head-on vehicle crash late Saturday afternoon.

Brandon B. Helmer, 26, was fatally injured in the wreck, which occurred at about 4:50 p.m. on Highway 29 south of Cruickshank Road outside of Kelseyville, according to the California Highway Patrol.

The CHP said 39-year-old Wayne L. Caldwell of Willits was driving a 1994 Dodge Ram pickup northbound on Highway 29 at 55 to 60 miles per hour while descending a slight downhill grade.

Helmer, driving a 1992 Acura Integra, was traveling southbound at an unknown speed, ascending an uphill grade, the report explained.

For an unknown reason, Caldwell allowed his pickup to cross the double-yellow lines and drift into the southbound lane, where he struck the front end of Helmer's car, the CHP said.

The CHP said that after the collision, Caldwell's pickup continued in a northerly direction and overturned down a dirt embankment on the east side of Highway 29.

Caldwell sustained minor injuries and was transported to Sutter Lakeside Hospital, where the CHP said he was treated and released.

Helmer was trapped in his vehicle and died at the scene, the CHP said.

The CHP said officers impounded both vehicles for inspection.

Based on the investigation so far, alcohol does not appear to be a factor in the collision, the CHP said.

CHP Officer Erich Paarsch is investigating the crash.