At least one person was critically injured Sunday in a crash on the westbound Pomona (60) Freeway in Pomona that overturned two vehicles.

The collision occurred on the 60 at Phillips Ranch Road around 6:50 p.m., overturned, according to the California Highway Patrol.

The crash initially shut down four lanes and a SigAlert was declared by the CHP at 7:14 p.m.

At least one person suffered major injuries and was transported to Pomona Valley Hospital Medical Center, the CHP reported. The person’s condition was unknown.

The freeway was cleared at 8:18 p.m. and the SigAlert canceled, the CHP said.

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