What you need to know about the Florida condo collapse as the search for survivors continues and probe begins

People look at a portion of the 12-story Champlain Towers South condo building that partially collapsed on June 24 in Surfside, Fla. (Joe Raedle/Getty Images)
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The recovery effort in Surfside, Fla., continues at the site of a condo building collapse that killed at least 86 people and left dozens more others unaccounted for.

Engineers have begun investigating the cause of the collapse, but officials say determining what led the 40-year-old 12-story building to partially fall will take time.

Here’s what you need to know about the situation: