It happened around 9:45 p.m. at Shuckers Bar & Grill in Miami’s North Bay Village.
About 100 people were on the deck watching the NBA Finals at the time of the collapse, Miami-Dade Fire Lt. Eugene Germain said.
Authorities were treating 24 victims, three of whom have “critical injuries,” Germain said.
The injured were taken to Jackson Memorial Hospital.
Authorities did not believe anyone was missing.