ROCKVILLE, Md. (AP) - Rescue crews on Saturday, Nov. 16 found the body of a construction worker who went missing after a deadly parking garage collapse.

Two other workers were killed when the floors of the unfinished garaged crashed down on them Friday afternoon, and another was hospitalized in critical condition.

Rescue crews who had held out hope of finding the missing worker spent Saturday gingerly lifting away concrete slabs before his body was discovered. Crews had searched through the night in pouring rain, using cameras on long, snaking cables to peer into dark crevices in the rubble but found no signs of life.

The cause of the collapse was still unclear Saturday. Just before the floors fell, workers heard a popping noise but no explosion, Piringer said. "It was just a bang or a pop, and then the floors collapsed," he said.

The trapped worker was believed to have been between the fourth and fifth floors, Piringer said. A search dog picked up a scent late Friday and rescue workers used thermal imaging to search, he said. Cables secured a concrete wall that remained standing after the floors of the unfinished garage collapsed.

Inspectors from Maryland Occupational Safety and Health and the U.S. Occupational Safety and Health Administration (OSHA) were on the scene.

Stanley Manvell, vice president of safety of James G. Davis Construction, the contractor on the site, said workers had been placing prefabricated concrete sections for the garage and welding them to the building. Fifteen workers had been at the site.

The building, under construction for six weeks, was about two-thirds finished.