(KTXL) — All lanes are blocked along Bradshaw Road, south Jackson Highway following a three-vehicle collision, according to the California Highway Patrol South Sacramento station.

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Photos from CHP show that a white work truck, a blue Toyota SUV and a third SUV were involved in the crash.

Metro Fire of Sacramento said that four people were involved in the collision. Two were transported to the hospital in critical condition and two others declined transport.

The cause of the crash has still not been determined and all lanes will be reopened once the vehicles are removed from the roadway.