Sao Paulo state Gov. Jose Serra, who visited the site, said the toll was seven dead and 57 people injured. He did not elaborate on their condition.
Goncalves said earlier that at least six people were severely hurt, while local media reported eight people in serious condition.
The cause of the collapse was not immediately clear, and authorities were investigating. Goncalves said the building was up to code.
Police and rescuers picked through a latticework of bent steel splayed across the floor of the evangelical church, housed in a former movie theater. Police helicopters carried the injured to hospitals.
The church, which can hold 2,000 worshippers and is usually crowded on Sundays, was relatively empty at the time of the collapse because it happened between two services, according to Goncalves.
As many as 1,000 people would likely have been inside just minutes before or after, she said.
The church on Sao Paulo's south side is where soccer star Kaka was married in 2005.
Reborn in Christ church leaders Estevam Hernandes Filho and Sonia Haddad Moraes Hernandes pleaded guilty in 2007 to smuggling more than $56,000 into the United States hidden in their luggage.
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