GARDEN GROVE (CBSLA) — Authorities on Sunday were investigating two separate crashes on the 22 Freeway in Garden Grove that resulted in the death of a semi-truck driver, and arrest of another driver.

Investigators say the first crash unfolded on the eastbound lanes of the freeway just passed the Valley View exit. It was there that authorities say the driver of a Honda lost control, hit a railing, and spun out of control.

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The single-vehicle crash resulted in that vehicle remaining disabled in the number 3 lane of the freeway. The driver, described as a 26-year-old male, managed to exit the car, and walk onto the shoulder of the freeway.

Moments after that crash, the semi-truck being driven by a contractor for the U.S. Postal Service struck the disabled vehicle. That truck hit the median, flipped over and caught fire. The driver died at the scene.

Evelina Ramirez, a USPS Corporate Communications spokesperson, released the following statement:

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“Postal Inspectors are currently on site of the accident involving a contractor driver carrying mail for USPS. No other details available at this time.”

Following the deadly crash, authorities placed the driver of the Honda under arrest on suspicion of driving under the influence.

“Again, it’s another reminder to everyone and all the public that you want to make sure you are not impaired while operating a vehicle,” said Ofc. Duane Graham of the CHP.

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All lanes of the freeway in both directions were expected to remain closed while authorities continue to investigate, and crews remove debris, including mail, from the scene.