WEST COVINA, Calif.—Los Angeles County prosecutors have filed murder charges for two drivers they say were street racing in West Covina when one of their vehicles crashed into a van and killed a 90-year-old woman.

The district attorney's office says 30-year-old Vincent Lopez and 34-year-old Victor Hugo Sanchez were each charged Thursday with one count of murder and one count of driving under the influence causing injury.

Celia La Torre of West Covina was in a wheelchair in the van Tuesday when it was hit by a car allegedly driven by Lopez. She was thrown from the van and killed. Her son, the van's driver, was injured. Lopez also was injured and remains hospitalized.

Prosecutors say the second car left the scene and Sanchez was arrested later.

Arraignment is scheduled for Friday.