ONTARIO, Calif. - Three people were killed, and several others were injured following a horrific chain-reaction crash in Ontario Tuesday afternoon.

Officials said the driver of a semi-truck, who they suspect failed to stop on time, was arrested on suspicion of driving under the influence of drugs.

Fiery eight-vehicle crash

What we know:

California Highway Patrol officers responded to a multi-vehicle crash on the westbound lanes of the 10 Freeway, west of the 15 Freeway, around 1:10 p.m. Tuesday, Oct. 21.

CHP investigators said the preliminary investigation reveals traffic had slowed or stopped when the driver of a tractor-trailer allegedly failed to stop on time, leading to a chain-reaction crash that involved eight vehicles. Four of the eight vehicles were commercial vehicles.

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