A 16-year-old boy was killed and several people were hurt when a woman crashed her speeding car into a minivan Friday in the Western Addition, San Francisco police said.

Police said an elderly woman driving a Mercedes-Benz at speeds of up to 80 mph west on Pine Street rear-ended the minivan while it was stopped at a light at Gough Street just before 7 a.m. The impact caused both vehicles to roll over.

Kevin San, 16, a student at Lincoln High School who was in the minivan, was killed and his mother and his sister were seriously hurt, authorities said. The driver of the Mercedes walked away from the crash with minor injuries, police said.

The identity of the Mercedes driver has not been released. She was not arrested pending the outcome of an investigation, which will include drug and alcohol testing, police said.

A catering van at the corner was also struck. Three people inside the van suffered non-life-threatening injuries.

Witnesses told police that the woman had been speeding for at least several blocks before the crash, said Police Chief Greg Suhr.