A shooting involving police has shut down all lanes of a busy Los Angeles-area interstate, causing major traffic backups during rush hour.

The California Highway Patrol says all lanes of Interstate 5 in the San Fernando Valley were shut down Monday afternoon.

Officer Jane Kim, a spokeswoman for the Los Angeles Police Department, says the officer-involved shooting happened after a vehicle pursuit.

Several damaged cars could be seen in the area of the shooting.

Kim says it's unclear whether anyone was hit, though witnesses at the scene reported a suspect was shot. She had no further details.

Traffic is backed up for miles in both directions along the freeway, with many drivers stranded and some trying to turn around and reach off-ramps.