By CBS13 Staff

VACAVILLE (CBS13) — Authorities say they believe DUI was a factor in a deadly crash along Interstate 80 in Vacaville early Thursday morning.

The crash happened just before 5 a.m. near the Highway 505 connector.

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Aftermath of the crash that involved at least five cars early Thursday morning. (Credit: CHP)

According to California Highway Patrol, witnesses reported seeing a Toyota sedan crash into the center median, then ricochet back onto the freeway and crash into another vehicle.

Three other vehicles then crashed into the Toyota sedan, ejecting the driver.

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The driver of the Toyota, only identified as a 33-year-old woman from Alameda, was pronounced dead at the scene by medics.

Officers are still investigating the crash, but they do believe drugs and/or alcohol were a factor.

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Traffic got diverted off eastbound I-80 for several hours as officers investigated the scene. A SigAlert was also issued. All lanes were reopened just before 8 a.m.