The death toll has risen to nine and more than 150 people are still missing as rescue teams continue to pick through the rubble of the Florida apartment building which collapsed three days ago.
Slim hopes remain that searchers will discover survivors in air pockets that may have formed in the pancaked debris.
Four bodies were removed overnight.
Questions continue to swirl over the structural integrity of the 12-storey tower in Surfside, a beachside town near Miami, where hundreds of people are waiting news on loved ones.
Concerns about the building's construction were raised three years ago in an engineer's report.
It suggested a design error had prevented water from draining away from the base. Eliana Salzhauer, an elected commissioner in Surfside, said a board that oversees the maintenance of the building will have questions to answer.
Miami correspondent Giles Gibson spoke to Susie Ferguson.