Latin American countries call summit over diversion of Evo Morales's plane "Latin America demands an explanation," tweeted Ecuadorean leader Rafael Correa. If what happened to Evo does not merit a Unasur summit, I don't know what does. Dilma Rousseff, president of regional economic powerhouse Brazil, issued a statement repudiating the European countries that denied Mr Morales access to their airspace based on what she called the "fanciful" notion that Mr Snowden might be on board. Bolivian President Evo Morales boards his plane at the Vienna International Airport (AFP) The Chilean Foreign Ministry issued a statement saying it "lamented" what happened to Mr Morales and that more clarity was needed on the facts. Much more blunt was the statement from Mexico's Congress condemning what it called the "disgraceful and discriminatory" treatment Mr Morales had received in Europe. A spokesman at France's Foreign Ministry blamed the flap on "an administrative mishap," saying France never intended to ban Mr Morales from its airspace and that there were delays in getting confirmation that the plane had fly-over permits. International agreements allow civilian airplanes to overfly countries without obtaining permission ahead of every flight. But state aircraft including Air Force One, the plane that carries the US president, must obtain clearance before they cross into foreign territory. Government aircraft, whether carrying diplomats or missiles, always require approval before they can enter foreign airspace, legal experts said. Bolivian officials were quick to accuse the United States of strong-arming the Europeans into denying access to their air space in an "act of intimidation" against Mr Morales for suggesting that while attending an energy conference in Moscow he would consider granting asylum to Snowden if requested. Morales said earlier this week no request had been made. The White House declined to comment on the assertion that it was behind the plane scandal. President Barack Obama has warned that giving Mr Snowden asylum would carry serious costs. Mr Snowden is believed to be still in the transit area of a Moscow airport, where he has been trying since June 23 to find a country that will offer him refuge from prosecution in the United States on espionage charges. The Bolivian government said it had filed a formal complaint with the United Nations and was studying other legal avenues to prove its rights had been violated under international law.