MINQUADALE, Del. (CBS) — Police say one person has died following a multi-vehicle crash in Wilmington, Delaware.

Authorities say the accident happened around 7:43 a.m. Friday on S. Market Street in the area of S. Walmut Street in Wilmington.

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An unoccupied school bus, a DART bus with several passengers and a passenger vehicle were all involved in the crash.

Officials say an occupant of the passenger vehicle has died. It is unknown if anyone else was injured.

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Police say both the northbound and southbound lanes of S. Market Street are closed and traffic is being diverted around the scene.

Commuters are urged to avoid the area.

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The fatal accident is under investigation.