CONTRA COSTA COUNTY -- A Richmond woman and her dog were killed in a head-on collision Wednesday afternoon near the San Pablo Reservoir, authorities said.

Details of the crash remain under investigation, but the CHP said an El Sobrante man was driving a Chevy SUV north on San Pablo Dam Road when he crashed into the woman's southbound Volkswagen Passat. The woman's name was not immediately released.

The man was taken to John Muir Medical Center in Walnut Creek with a broken wrist and broken arm, and contusions to his head. His name was also not released.

The road was closed in both directions until about 3 p.m., according to the California Highway Patrol.