8 big rigs involved in chain-reaction crash on 60 Freeway in Chino

CHINO, Calif. (KABC) -- A chain-reaction crash involving eight big rigs shut down multiple lanes on the 60 Freeway in Chino on Tuesday.

The wreck occurred around 11:45 a.m. near the Central Avenue exit on the eastbound side of the freeway. Traffic was reduced to one lane, causing an extended backup.

Four people were treated and one was transported to an area hospital with minor injuries, according to a tweet from the Chino Valley Fire Department.

The cause of the crash was not immediately known.

DEVELOPING...We will add more details to this report as they become available.