Federal investigators have zeroed in on flaws in the pool deck as the preliminary cause of the 2021 collapse of a 12-story Florida beachfront condominium that killed 98 people.

More than four years after a Florida condominium collapse killed 98 people, federal investigators have yet to make a final determination of the cause.

Federal investigators discussed their investigation as the one-year mark for the Surfside condo collapse approaches.

Video released by a team of federal investigators shows more evidence of extensive corrosion and overcrowded concrete reinforcement in a Miami-area condominium that collapsed in June, killing 98 people.