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Freak downpour causes 70-car pileup in Ariz.

August 29, 2010 12:00:00 AM PDT
Authorities say about 70 cars slammed together in a series of crashes Saturday on I-10 in Phoenix.The accidents, which were on a stretch of two miles, were caused by a freak downpour.

Paramedics say they had to treat about 40 people, six of them were taken to the hospital. One of the victim's injuries were serious.

Part of the freeway was shut down for about three and a half hours while authorities investigated.