A woman suspected of driving under the influence and two passengers are dead following a crash on Highway 12 in San Joaquin County Sunday afternoon, the California Highway Patrol said.

The crash site sits along a bustling corridor for traffic heading onto the highway or deeper into Napa, with a gas station to the north and a park-and-ride to the south. The offramp, lined with scattered trees and plants, was shut down until noon as investigators worked to determine how fast the sedan was traveling before impact.

Two children are dead and their mother is behind bars suspected of driving under the influence following a crash in Napa County Sunday morning, the California Highway Patrol said.

A Napa mother was arrested on suspicion of DUI after a crash that killed her two young children and left her seriously injured, authorities said.

CHP investigates a deadly crash on Hwy 12 where three people died in a Ford Fiesta. SAN JOAQUIN COUNTY, Calif. — Three people died in a wrong-way crash along Highway 12 in the San Joaquin County town of Clements.