1 dead in multi-car crash on 91 West in Riverside

RIVERSIDE, Calif. (KABC) -- One person was killed in a crash involving multiple vehicles on the westbound 91 Freeway on Tuesday.

The crash happened at Mission Inn Avenue around 8:30 p.m. Three right lanes are blocked.

A cause for the crash was not immediately known. It was not immediately known how long traffic delays would last.