LODI (CBS SF) — Three people were killed and two California Highway Patrol officers seriously injured in an early morning crash on Interstate Highway 5 near Lodi, authorities said Tuesday.

The California Highway Patrol said the crash occurred at approximately 2:30 a.m. on southbound I-5 south of Walnut Grove Rd.

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Two CHP officers were assisting the driver of a disabled tractor trailer on the freeway when for unknown reasons a driver lost control of a passing 2021 Subaru SUV that veered toward them.

The vehicle collided with the rear of the CHP patrol vehicle, sending it a dirt embankment. The Subaru then collided with a tree and became fully engulfed in flames.

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The force of the impact completely ripped apart the CHP vehicle.

All three occupants in the vehicle succumbed to their injuries on scene. The two CHP officers were transported to a nearby hospital with major injuries. Their conditions were not immediately known.

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It was unknown whether drugs and/or alcohol were a factor in this collision.