Brazilian National Force military firefighters stand in line to board a plane to Rondonia northern Brazil, to help fight fires in the Amazon rainforest at the Military Air Base in Brasilia, on Saturday. Photo: VCG

Brazil's defense minister said on Monday 63 people were arrested and issued fines amounting to $8.7 million after the military was sent to fight raging fires in the Amazon rainforest.

The announcement came as Brazilian President Jair Bolsonaro arrived in New York to attend the UN General Assembly, where he said he would "reaffirm the sovereignty" of Brazil after the surge in blazes sparked international outcry.

Amid the criticism, the president in ­August authorized the deployment of the military to the Amazon in an operation that was extended to October 24.

Defense Minister Fernando Azevedo e Silva told a press conference that the military made 571 land and 250 air raids to combat the fires in the rainforest, a major absorber of carbon dioxide that's home to one of Earth's most ­concentrated and extensive collections of biological diversity.

Based on research from the country's National Institute for Space Research, Brazil in August recorded 30,901 fires in the Amazon region, almost triple the 10,421 recorded in the same month in 2018, Azevedo said.

The minister emphasized that the number of fires recorded so far this month in the rainforest was 17,095, well below the historical average for September of 33,426, while acknowledging that concerns remained over fires burning in certain areas, specifically the center of the forest.

"What was coming, mainly from the outside, was that the Amazon was on fire. We showed the reality, and I think it is far from a burning Amazon," the ­minister said, speaking alongside a technical team that participated in the military operation.

As the number of fires grew in Amazon, Bolsonaro faced criticism within Brazil and abroad.

The Brazilian president hit back, accusing France and Germany of "buying" Brazil's sovereignty after the G7 group of rich democracies offered $20 million in Amazon fire aid.