SANTA ANA, Calif. (AP) — An investigation into a fiery car crash that killed five California teenagers was in its early stages Monday and no charges have been filed against the 16-year-old unlicensed driver who survived, authorities said.

Investigators were seeking witnesses to the crash early Saturday in which a white 1995 BMW struck an Interstate 5 guardrail in Orange County, rolled onto an embankment and burst into flames.