BLACK CANYON CITY, Ariz. (AP) - Authorities say a tractor trailer has crashed, causing a massive chain reaction on a major freeway north of Phoenix.
The Arizona Department of Public Safety says an accident involving a commercial cattle hauler and as many as 20 vehicles occurred Sunday afternoon on I-17 in Black Canyon City.
There were no immediate reports on the number or nature of injuries.
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Phoenix firefighters say they are dispatching engines and ambulances per a request from local officials.
The Arizona Department of Transportation says the accident has led to the closure of all southbound lanes on I-17.
Motorists should expect delays.
They are being advised to take alternative routes to get to I-17 such as SR 260 eastbound to SR 87 southbound.
Black Canyon City is about 55 miles north of downtown Phoenix.
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