SANTO DOMINGO, Dominican Republic — A crowd of people grew increasingly agitated Wednesday as they waited at the Dominican Republic’s forensic institute for news of their loved ones still missing a day after a roof collapsed at an iconic nightclub, killing at least 124 people and injuring hundreds more.

National Institute of Forensic Pathology officials read the names of 54 people they have identified so far.

“We cannot wait until nighttime!” said one woman who was waiting for news of a relative whose name she did not hear. “We’re going to go crazy!”

Officials called for calm, saying they have already delivered 28 bodies to their families but did not yet have a tally of the bodies recovered. Officials said more than 250 people were hurt.

“The authorities are selling us false dreams!” cried out José Sánchez, whose brother and brother-in-law were still missing.

The legendary Jet Set club in Santo Domingo was packed with musicians, professional athletes and government officials when dust began falling from the ceiling and into people’s drinks early Tuesday.

Minutes later, the entire roof collapsed. Concrete slabs killed some instantly and trapped dozens of others on a dance floor where hundreds had been dancing to a lively merengue concert. In the minutes that followed, the country’s 911 system received more than 100 calls, many from people buried under rubble.

The victims include merengue icon Rubby Pérez, who had been singing to the crowd before disaster struck. His body was found early Wednesday, emergency operations director Juan Manuel Méndez said.

Rescue crews were still searching for survivors more than 24 hours after the collapse.

Officials said Wednesday they had rescued 145 survivors.

“As long as they report that there is a missing person, we will be here,” Méndez said.

Rescue crews from Puerto Rico and Israel arrived Wednesday to help with the search. Officials said sonar detected what could be one person still breathing under the rubble.