SANTA MARIA, Calif. - UPDATE 6/1/2018 2:09 A.M.: Both directions of State Route 166 are back open after a semi-truck overturned Thursday night near the Twitchell Reservoir.
California Highway Patrol is on the scene of a semi-truck that has overturned on State Route 166 and has closed the highway in both directions.
The incident is reported to have happened around 8:30 p.m. near the Twitchell Reservoir.
CHP says there have been no injuries reported.
Cuyama Highway is blocked 10 miles in each direction.
CalTrans has issued a SigAlert.