Walker's publicist Ame van Iden confirmed his death, but said she could not elaborate beyond statements posted on Walker's official Twitter and Facebook accounts.
Walker was a passenger in a friend's car and both were headed to a charity event for his organization, Reach Out Worldwide, according to a statement posted
on his Facebook page. The website for the charity indicated there was an event in Southern California on Saturday to benefit victims of Typhoon Haiyan in the Philippines.
The Santa Clarita Valley Signal, citing a sheriff's deputy at the scene, said a red Porsche appeared to have lost control and struck a tree.
Deputies arrived at the scene to find a vehicle on fire, the sheriff's department said in a statement.
Once fire crews put the flames out, they found two occupants, both of whom were pronounced dead at the scene.