FREMONT (KRON)–All southbound lanes are currently blocked on Interstate Highway 680 just north of Vargas Road in Fremont due to a collision, according to California Highway Patrol officials.

The collision was first reported at 4:36 a.m. and involves at least three vehicles.

A Sig-alert was issued at 4:55 a.m. because all southbound lanes are blocked.

Motorists are asked to use an alternate route.

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