The bodies of two more people have been found at the site of a partially collapsed oceanfront condominium building in the Miami area, raising the death toll to 20 people with 128 still missing.

Miami-Dade County Mayor Daniella Levine Cava said Friday that the bodies were found Thursday evening, after concerns about the structure's instability prompted a 15-hour halt to the search for survivors. The remains of the two victims were seen being placed into body bags Friday and taken to medical examiner vans parked nearby.

Cava said the 7-year-old daughter of a Miami firefighter was among the victims.

Scott Nacheman, a FEMA structures specialist, said engineers are looking at different methods for the demolition and how to proceed "to make the site safe for ongoing rescue operations."

Nacheman said that if the building comes down, there initially will be a slowdown in the rescue operation. But he said the demolition of the structure would create a safer working environment that could allow more personnel on the site and accelerate the pace of the work.

He said it would likely be weeks before officials schedule the demolition.

On Friday morning, about a dozen workers could be seen digging through the pile that now reached about 20 feet (6 meters), more than 10 feet (3 meters) less than it was a week ago. Cranes were again lifting heavy objects from the pile and then workers would climb into the pile and begin removing smaller rubble by hand.

Miami-Dade County Mayor Daniella Levine Cava said the decision about the demolition needs to be made "extremely carefully and methodically," considering the potential impact on the pile of debris and the effect on the search.

(With input from agencies)