ONTARIO, Calif. -- WARNING: The video in the player above may be disturbing to some viewers.

The driver of a semi-truck that slammed into multiple vehicles, killing three people, on a California highway was allegedly under the influence of drugs, authorities said.

The driver -- identified by authorities as 21-year-old Jashanpreet Singh -- has been charged with gross vehicular manslaughter while intoxicated and driving under the influence of a drug causing injury in connection with Tuesday's chain-reaction crash on Interstate 10 in Ontario, according to a criminal complaint.

He is in the United States illegally and an immigration detainer has also been placed on him, according to the Department of Homeland Security.

Authorities said Singh was driving a Freightliner semi-truck and fai

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