Traffic was cut off in both directions on a portion of the Silverado Trail after a three-car wreck Upvalley late Sunday afternoon, according to the California Highway Patrol.
The crash was reported at 4:10 p.m. near the Pratt Avenue bridge north of St. Helena, and involved a head-on collision involving a Dodge Charger, Toyota Prius and Nissan Altima, according to the CHP's online incident log. An ambulance was dispatched to the scene.
Both lanes of Silverado remained shut down as of 5:30 p.m., the highway patrol website indicated.
No further details were immediately available.