Six to 10 people were killed when a newly installed pedestrian bridge spanning several lanes of traffic collapsed at Florida International University (FIU) on Thursday.
Emergency personnel searched for signs of life amid the wreckage of concrete, twisted metal and that rained from the collapsed structure and crushed vehicles on one of the busiest roads in South Florida.
The Florida Highway Patrol previously said several people were killed but did not release a figure on fatalities.
At least six injured people were taken away from the scene and eight vehicles were trapped in the bride wreckage, Miami-Dade County Mayor Carlos Gimenez said.
At one point, police had requested television helicopters to leave the area so rescuers could hear for any sounds of people crying for help from beneath the collapsed structure.