FAIRFIELD (CBS13) – Authorities say three people were found dead in a car that crashed off Interstate 80 near Fairfield early Friday morning.

The scene was along the eastbound side of the freeway, near the Highway 12 connector.

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California Highway Patrol says the crash is believed to have happened early in the morning but wasn’t reported until about 5:30 a.m. A blue Hyundai sedan was heading on eastbound I-80 when, for an unknown reason, it crashed into the Highway 12 overcrossing.

It wasn’t until a passerby called to report the aftermath of the crash that CHP learned of the incident.

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Once at the scene, officers found three people dead inside the car.

Officers believe the three people killed, two women and a third person of unknown gender, were in their early 20s.

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It’s unclear at this point in the investigation if drugs, alcohol, distracted driving or anything else played a factor in the crash.