Brazil and Mexico demand explanation over claims their Presidents were spied on by the United States

Brazil and Mexico have both demanded an explanation from the United State's National Security Agency spied on their Presidents. Journalist Glenn Greenwald, the man who wrote articles using documents leaked by Edward Snowden, said internet data from Brazilian leader Dilma Rousseff and Mexican President Pena Nieto was intercepted by spying agencies in the US. Mr Greenwald said classified-documents given to him by US fugitive Edward Snowden showed how US agents had spied on communications between aides and the Brazilian President Rousseff. The journalist also added that, since  Pena Nieto even became President, NSA agents were monitoring him. He also quoted a document dates July 2012, which Mr Greenwald said showed that US Agents had been reading the Mexican leaders emails. Brazil said data interception would represent an unacceptable violation of sovereignty, with the Justice Minister saying: "If these facts prove to be true, It would be unacceptable and could be called an attack on our country's sovereignty." Mexico has called a probe into the allegations and, according to the AFP News Agency, both countries have summoned their US ambassadors.