A pregnant woman and her unborn child were killed in a weekend road rage incident that ended in a three-car crash south of Los Angeles, police said.

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A 26-year-old man was arrested on suspicion of charges including gross vehicular manslaughter while intoxicated following the collision Sunday in Long Beach, the Los Angeles Times reported.

The suspect and a 10-year-old boy riding with him in a pickup truck suffered non-life-threatening injuries, authorities said.

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Long Beach police said the pickup's driver had been in a road rage conflict with the driver of another vehicle before the pickup crashed into the car driven by the 23-year-old pregnant woman.

The pickup then smashed into a parked, unoccupied truck.

The woman in the car and her unborn child died at a hospital.

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The suspect's bail was set at $200,000, the Times reported.