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Colorado officials today cautioned that the cause of last week's fatal explosion and fire in a Firestone house has not been determined yet, even as they conveyed their sympathies to the families of the two men killed the April 17 disaster.
But as they addressed the tragedy in the Weld County community — and Wednesday's decision by Anadarko Petroleum Corp. to temporarily shut down thousands of gas wells nearby — they also left unanswered questions about why the tragedy happened, and what was…