DUBLIN (KRON) — Three southbound lanes are closed Monday on the Sunol Grade due to a motorcycle accident at Vargas Road, according to the California Highway Patrol.

The three left southbound I-680 lanes were closed after the accident occurred just before 7 a.m. Monday, according to the CHP.

UPDATE: All lanes are reopened, but drivers should expect delays.

KRON 4 will update this story as details become available.