The discovery of four more victims, including one Canadian, in the rubble of a collapsed Florida condominium building has raised the death toll to 32.

Miami-Dade County's assistant fire chief announced the new death count to family members this morning.

Mayor Daniella Levine Cava says 113 people remain unaccounted for, though only 70 of them are confirmed to have been in the building when it collapsed.

Officials overseeing the search at the site of the Florida condominium collapse seem increasingly somber about the prospects for finding anyone alive.

They said Tuesday that crews have detected no new signs of life in the rubble nearly two weeks after the disaster struck at the Champlain Towers South building in Surfside.

Miami-Dade County Fire Chief Alan Cominsky said search teams continue to look for survivors, but they have not found ``anything positive'' such as livable spaces in the debris.

While the effort is still officially called a search-and-rescue mission, Miami-Dade Mayor Daniella Levine Cava said families of those still missing are preparing for news of ``tragic loss.''