SURPRISE, AZ (AZFamily) — The Arizona Department of Public Safety says the northbound lanes of the Loop 303 freeway are closed in the northwest Valley as troopers investigate a crash that left at least one person seriously hurt.

Details are limited, but authorities confirmed it happened near Clearview Boulevard, which is south of the U.S. 60/Grand Avenue interchange.

Troopers said the wreck involved four cars, and traffic cameras in the area showed an extensive backup in both directions of the freeway.

No other information has been released.

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