Death toll climbed to five after rescue teams found another body in the rubble of a partially collapsed 12-story condominium tower on Saturday.

Miami-Dade Mayor Daniella Levine Cava announced the heightened toll at an evening news briefing, saying the identification of three bodies had dropped the number of unaccounted for down to 156. She said crews also discovered other unspecified human remains.

The Miami-Dade Police Department later Saturday said four of the five deceased had been identified, along with the apartments where they were at the moment of the collapse. One of those killed was the mother of a boy who was rescued the night the building toppled, another couple in their late 70s and early 80s and a 54-year-old man.

Officials said remains are being sent to the medical examiner, and they are also gathering DNA samples from family members to help identify them.

Separately, a video posted online showed an official briefing families of missing loved ones. When he said they had found remains among the rubble, people began sobbing.

Throughout the day, rescue workers scoured the mountain of debris with trained dogs and sonar, searching for any survivors. “Our top priority continues to be search and rescue and saving any lives that we can,” the mayor said.

But crews had to fight flames in the debris during the day. At one point Saturday, a fire hose blasted one of the lower floors on the north side of the tower as white smoke or steam streamed out. A bitter, sulfur-like smell hung in the air.

“The stench is very thick,” Florida Gov. Ron DeSantis said.

A crane removed pieces of debris from the more than 30-foot pile in the city of Surfside, and scores of rescuers used big machines, small buckets, drones, microphones and their own hands to pick through the rubble.

For many with missing loved ones, the wait was agonizing.

Among those awaiting word of loved ones was Rachel Spiegel, whose mother, 66-year-old Judy Spiegel, lived on the sixth floor. Speaking beside her siblings, she said Saturday that “we’re trying to hold it together.”

“I know my mom is a fighter. I know she loves us. I know she doesn’t want to give up. So, you know, it’s day three, so it’s hard,” Spiegel said.

President Joe Biden said via Twitter that he had spoken with DeSantis on Friday to offer assistance as needed.

“My heart is with the community of Surfside as they grieve their lost loved ones and wait anxiously as search and rescue efforts continue,” Biden tweeted.

Authorities announced they were beginning an audit of buildings nearing their 40-year review – like the fallen Champlain Towers South – to make sure they’re safe. The mayor asked other cities in the county to join the building review and said there will be state and federal funding to help.

A federal agency specializing in disaster losses and structure failures is sending a half dozen scientists and engineers to collect direct information for determining whether to pursue a more thorough study.

The first team members arrived Friday, said Jason Averill, an official at the National Institute of Standards and Technology. That agency also investigated the collapse of the Twin Towers on 9/11, and more recently, Hurricane Maria devastation in Puerto Rico, among other disasters.

Separately, the government of Israel said it was sending a team of engineering and rescue specialists to aid the search. Israeli media have reported that some 20 citizens of that country were believed among the missing.

Another 22 people unaccounted for were from Argentina, Venezuela, Uruguay and Paraguay, including relatives of Paraguayan first lady Silvana de Abdo Benítez.