Humphrey says the four injured were in the cars.
The train remained upright and on the tracks. Humphrey says no injuries have been reported aboard the train.
A phone message left for Metrolink was not immediately returned.
LA commuter train, 2 cars in collision
LOS ANGELES (AP) Fire Department spokesman Brian Humphrey says the crash occurred shortly after 7 a.m. Wednesday between a commuter train and at least two cars. Television reports show one mangled car and another damaged vehicle alongside tracks on which a Metrolink train has stopped.
