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The Coconino County Sheriff's Office said the bodies of the four family members were discovered Monday in Parks, Arizona, following a request for a welfare check. (Google Map)

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Heating system failure found at Arizona cabin where 4 died

A contractor has found a "significant failure" in the heating system at an Arizona vacation cabin where a family of four was found dead of possible carbon monoxide poisoning, authorities said Tuesday.

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Family of 4 found dead in Arizona vacation cabin

An Arizona family of four, including two young children, staying in a northern Arizona cabin has been found dead of possible carbon monoxide poisoning.