Four people are dead and dozens are missing after a condo collapsed near Miami. Here's what experts think caused the deadly collapse. RELATED:
Rescuers were searching for survivors in the rubble Friday after a 40-year-old South Florida beachside condo building collapsed, killing at least four people and leaving 159 unaccounted for.
Investigators were working to determine what caused part of the Champlain Towers South, a 12-story condominium, "pancaked" in the town of Surfside, Florida, shortly before 2 a.m. Thursday.
About half of the building's more than 130 units were affected, said Miami-Dade County Mayor Daniella Levine Cava.
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