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Updated at 1:24 a.m. ET: Police say a second body has been found in the rubble of a collapsed parking garage at Miami-Dade Community College’s west campus in Doral, Fla.

One person was trapped for hours under the rubble. Shortly after midnight, rescue workers decided to amputate the man's legs and pull him from the rubble, the Miami Herald reported. He was rushed to a local hospital in critical condition early Thursday morning, according to the Herald report.

Another person who had been trapped when the structure collapsed at around 11:40 a.m. was rescued earlier.

Some 300 rescuers rushed to the scene when a portion of the five-story parking garage at 3800 N.W. 115th Ave. collapsed in what authorities call a "pancake-style collapse." Police said it appeared that only construction workers were at the site.

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Earlier in the day, four people were transported to Kendall Regional hospital in Miami, and three others were treated on the scene with minor injuries.

J Pat Carter / AP Firefighters remove a victim from the rubble after a section of a parking garage under construction at Miami-Dade College campus collapsed in Doral, Fla., Oct. 10, 2012.

The garage was under construction and had yet to open, so no students were in danger, said college spokesman Juan Mendieta.

One construction worker said he was on the top floor during the collapse and he started running. He described the floors as pancakes stacked on top of each other.

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The debris was about 20 feet high and a crane and heavy truck were inside the work area when the garage collapsed. Street around the garage were completely blocked off.

Aerial footage showed firefighters escorting a man, who appeared to be a construction worker, out of the garage, while rescuers apparently searched through the debris.

Victoria Buczynski of Miami said she saw the collapse while she was working at Gurkha Cigars directly across the street from the construction site.

The rubble of a garage under construction is seen at Miami-Dade College's west campus in Doral, Fla., on Wednesday.

"It fell to the ground like a house of cards," Buczynski said. "The construction workers started running out, screaming. It was loud. Our entire building shook."

The construction of the 1,855-space garage was nearly complete. Ground was broken on the $22.5 million project in February, and it was to be finished in December, according to the website of the contractor, Ajax Building Corp.

William P. Byrne, Ajax president and chief executive officer, said in a statement said an internal review was being launched to determine the cause.

"While we do not yet know the cause of this tragic collapse, we are committed to working actively and cooperatively with our design and construction partners and local, state and federal authorities to determine the exact cause of this accident," the statement said.

The statement also said safety was a priority for the company.

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