Bolivia has accused Austria of “kidnapping” their president after refusing to allow a plane carrying Evo Morales into their airspace amid suggestions NSA whistleblower Edward Snowden was on board.

“We're talking about the president on an official trip after an official summit being kidnapped,” Bolivia's ambassador to the United Nations in New York, Sacha Llorenti Soliz, told reporters in Geneva on Wednesday.

“We have no doubt that it was an order from the White House. By no means should a diplomatic plane with the president be diverted from its route and forced to land in another country.”

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Bolivia has also accused European states of an “act of aggression” and “an offence against the whole Latin region” over the affair and has asked for a crisis meeting of South American leaders after officials expressed outrage at Mr Morales' treatment.

Bolivian Foreign Minister David Choquehuanca blamed the forced stopover in Vienna on “unfounded suspicions that Snowden was on the plane”.

“We don't know who invented this lie,” Mr Choquehuanca said in La Paz. “We want to express our displeasure because this has put the president's life at risk.”

However, Deputy Chancellor Michael Spindelegger said that President Evo Morales had agreed to the inspection. He confirmed Snowden was not on board when Mr Morales' plane was diverted on a flight from Russia and forced to land in Austria over suspicions that the whistle-blower could have been inside.

Speaking to reporters at the airport, Mr Spindelegger said: “Our colleagues from the airport had a look and can give assurances that no one is on board who is not a Bolivian citizen.”

The plane carrying the Bolivian president finally took off from Vienna's airport to continue it's journey shortly before noon on Wednesday.

Bolivia claimed that France, Portugal, Spain and Italy blocked the plane from flying over their territories, forcing the unscheduled stopover in Vienna. There was no evidence that Snowden, wanted by Washington for espionage after divulging classified details of US phone and internet surveillance, had left the transit area of Moscow's Sheremetyevo airport.

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French officials denied on Wednesday that France refused to let the Bolivian president's plane cross over its airspace amid suspicions that Snowden was aboard. Spain, too, said the plane was free to cross its territory.

According to the anti-secrecy organisation WikiLeaks, Mr Snowden applied for asylum in 21 countries, with letters passed to Russian officials who met him at his secret location in the Moscow airport, where he has stayed since fleeing Hong Kong, where the US attempted to launch an extradition bid. The US has charged the former intelligence contractor with violating espionage laws for leaking classified information about US surveillance operations.

As Snowden, 30, prepared to spend his 10th night at the airport, he was dealing with outright rejections from Brazil and India. Finland, Ireland, Austria, Norway and Spain said requests for asylum have to be made in person on their territories to be considered. The Polish Foreign Minister Radoslaw Sikorski wrote on Twitter that he would “not give a positive recommendation” to the request.

Snowden’s most likely destination had initially appeared to be Ecuador, but President Rafael Correa has sharply backtracked in recent days, describing the issue of the temporary travel pass that allowed Mr Snowden to depart Hong Kong for Moscow by Ecuador’s London Consul as a “mistake”. He has not completely ruled out asylum for Mr Snowden, but has said the American would need to reach Ecuadorian territory before any request could be considered, which currently does not seem possible.

Venezuelan President Nicolas Maduro has said that he would consider an asylum request from Snowden, but suggestions that the Latin American leader, who is in Moscow for an international gas forum, might spirit him away on his presidential jet appeared unfounded. However, he did speak out in favour of Snowden. “He deserves the world’s protection,” Mr Maduro said. “What has he done? Did he launch a missile and kill someone? Did he rig a bomb and kill someone? No. He is preventing war.”

There have been no confirmed sightings of Snowden since he landed in Moscow on 30 June, leading many to believe he is being guarded by Russian security agents, although President Vladimir Putin has denied this. It had seemed that Russia might be preparing to offer shelter after Snowden handed an asylum application to the duty consul at Sheremetyevo on Sunday. President Vladimir Putin said Russia could offer Snowden asylum on the condition that the whistleblower stopped leaking information “harmful” to the US. Mr Putin’s spokesman Dmitry Peskov said that this condition had been too much for the stranded American, who had then withdrawn his application.

Additional reporting by agencies