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Crews are on the scene of a fatal collision that has caused most lanes on northbound I-5 at the 580 connector to be closed down.

The area where the accident occurred is just south of Tracy.

At this time, CHP has confirmed at least one fatality.

It is not clear exactly how the accident happened but, approximately eight cars were involved and a semi-truck fatally struck a sedan.

Modesto CHP says the area should be cleared close to 8:30 a.m.

Stay with FOX40 for updates in this story.