NEW : Brazil 's foreign minister decries an ` ` unacceptable violation '' of the country 's sovereignty . Sao Paulo , Brazil ( CNN ) -- He summons the U.S. ambassador to demand an investigation . Journalist Glenn Greenwald tells Brazil 's state media about NSA documents . He says the document is on Mexico 's soon - to - be president discussing his Cabinet meetings .
NEW : Brazil 's foreign minister decries an ` ` unacceptable violation '' of the country 's sovereignty . He summons the U.S. ambassador to demand an investigation . Journalist Glenn Greenwald tells Brazil 's state media about NSA documents . He says the document is on Mexico 's soon - to - be president discussing his Cabinet meetings .