BRENTWOOD (CBS SF) — Three people were hospitalized, one with major injuries, following a two-vehicle collision early Sunday morning on state Highway 4 in Brentwood.

The crash was reported at 4:45 a.m. east of Balfour Road in Brentwood and East Contra Costa Fire Protection District crews found three
people injured and closed Highway 4 in both directions.

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A helicopter was summoned to take a patient with major injuries to John Muir Medical Center in Walnut Creek. The other two victims were taken to the medical center by ambulance.

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The cause of the crash is under investigation by the California Highway Patrol.

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Speeding has been an issue on Highway 4 for months. On Thursday, an intense CHP crackdown on speeders along the roadway ended up with over 175-plus citations written with over 100 of those being speed citations.