PHOENIX – A serious crash at the Deck Park Tunnel in downtown Phoenix is causing significant delays for Monday morning commuters, authorities said.

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The crash blocked the left lanes of eastbound I-10 near the start of the tunnel at Third Avenue, according to the Arizona Department of Transportation.

As of around 6:30 a.m., eastbound Interstate 10 was backed up almost to the Loop 202 South Mountain Freeway. The transition ramp from southbound I-17 to eastbound I-10 was also impacted.

No other details about the crash were immediately available.

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