By CBS13 Staff

ZAMORA (CBS13) — Four farm workers were killed after a vehicle veered off the road and crashed into a tree in Yolo County, authorities said Thursday afternoon.

The crash happened at around 3 p.m. where County Roads 13 and 14 meet. The area is northwest of Woodland and near the small community of Zamora, which is located along Interstate 5.

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The California Highway Patrol Woodland said no other vehicles were involved in the crash.

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Three farm workers were pronounced dead at the scene. At some point during the night, CHP says a fourth one was pronounced dead.

Officers say the driver was one of the people who died.

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The cause of the crash is under investigation.