Mystery of what caused Florida condo collapse deepens
Gregory Krieg and Curt Devine, CNN
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(CNN) — The collapse of a high-rise condo tower in South Florida early Thursday morning has left at least four people dead and 159 more currently unaccounted for. Now, as the search for survivors continues, a critical question looms: What caused the building to fall?
Officials are promising an urgent inquiry as engineers have said it is impossible, at this stage, to pinpoint a precise reason. Local officials familiar with the condo complex, which is only four decades old, have repeatedly shot down rumors that it was in any unusual state of disrepair.