CONTRA COSTA COUNTY — A main road is open again in unincorporated Contra Costa County east of Byron Thursday afternoon following a head-on collision, officials with the California Highway Patrol said.

Both directions of Vasco Road about three miles south of Camino Diablo are open again as of 4:32 p.m.

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The road had been closed for about two hours.

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CHP Officer Eric Anderson said the collision left two people with major injuries, two with moderate injuries and two with minor injuries.

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