Brazil and Mexico have summoned US ambassadors to demand explanations after a report showing that the US National Security Agency(NSA) has spied on the Latin American countries’ presidents.On Monday, a Brazilian Foreign Ministry spokesman said US Ambassador Thomas Shannon "was called to explain" the new allegations. The report, which was based on leaked documents by former NSA contractor Edward Snowden, was presented on Sunday by journalist Glenn Greenwald on the Brazilian television program Fantastico. According to Greenwald, one of the leaked documents reveals that the emails of Brazilian President Dilma Rousseff have been intercepted with the help of DNI Presenter, which is a program used by the NSA to open and read online communications. In reply to the recent revelations, Rousseff called a cabinet meeting that will include her ministers of defense, foreign affairs and justice. "We are in an emergency situation due to these spying allegations," O Estado de Sao Paulo newspaper quoted Gilberto Carvalho, Rousseff’s chief of staff, as saying. Also on Monday, the Mexican Foreign Ministry said in a statement that a diplomatic note has been sent to Washington calling for “an exhaustive investigation” into the surveillance of President Enrique Pena Nieto and that, it "categorically rejects and condemns any kind of spying against Mexican citizens in breach of international law." The leaked document presented by Greenwald shows that the NSA monitored the emails of Nieto. The document was dated June 2012, a month before Nieto was elected as president and indicated whom he would like to name to some government posts. In another report In July, Greenwald cited documents that showed the NSA had collected data on billions of Brazilian emails and telephone calls, which made Brazil the largest target in Latin America. On August 29, during an official visit to the United States, the Brazilian justice minister criticized Washington for spying on Brazilian companies and individuals, saying the surveillance violated the country’s sovereignty.