STOCKTON (CBS13) — A rollover crash has southbound Interstate 5 through Stockton backed up Friday morning.

The crash happened a little after 5:30 a.m. near the French Camp Road onramp.

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Exactly what led up to the crash is unclear, but several vehicles were reportedly involved. One of the involved cars ended up on its roof.

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It’s unclear if there were any injuries.

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Traffic is backing up from the I-5 and Highway 4 connector through French Camp Road. A SigAlert has been issued and drivers are being urged to use an alternate route.