159 people are unaccounted for, reports indicate.

*Updated on June 25, 2021, at 2:02 p.m. (MT):

A 12-story condo complex in Miami, Florida, collapsed early Thursday morning, say authorities. Search and rescue crews are combing through the rubble and debris in search of survivors. At least 4 people have died, with 159 others unaccounted for.

It's unknown how many people were inside the building when it collapsed. At least 120 people have been accounted for.

"I want to stress that these numbers are extremely fluid and continue to change," a spokesperson for the mayor’s office told BuzzFeed News.

Assistant Fire Chief of Operations Ray Jadallah of Miami-Dade Fire Rescue says 55 of the 136 units at the complex collapsed.

The Miami-Dade Fire Rescue received a call at around 1:30 a.m. about a partial collapse of the Champlain Towers South condominium in the beachside town of Surfside, which is located about 6 miles north of Miami Beach.

Rescue crews are trying to "tunnel in" and locate additional survivors.

"We're going to do everything we can possibly do to identify and rescue those who have been trapped in the rubble," said Daniella Levine Cava, mayor of Miami-Dade County.

Aventura Hospital said they'd received 3 patients from the scene. Two were in critical condition.

*This is an ongoing investigation and this story will be updated as more information is known. Refresh for updates!