At least five vehicles were involved in the mishap. However, reports did not indicate the manner in which they collided.

Contra Costa, CA. – At least one person was killed in a traffic collision on Interstate 680 in Contra Costa Sunday night, according to the California Highway Patrol.
The incident was reported at around 10:54 p.m. on the southbound 680 Freeway just north of Concord Avenue of-ramp.
At least five vehicles were involved in the mishap. However, reports did not indicate the manner in which they collided.
At least one person was killed in the wreck.
The crash remains under investigation.
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