WikiLeaks founder Julian Assange urged President Barack Obama to end the US “witchhunt” against his whistleblowing website yesterday, speaking from Ecuador’s London embassy where he has been holed up for two months.

Mr Assange walked into the embassy in June after exhausting all legal avenues in Britain to stop being extradited to Sweden, where he is wanted for questioning over sex crimes.

“I ask President Obama to do the right thing, the United States must renounce its witchhunt against Wiki­Leaks,” said Mr Assange in his first public comments since being granted political asylum by Ecuador on Thursday.

Mr Assange praised the “courage” shown by the Latin American nation’s President Rafael Correa in giving him asylum, a move that has angered Britain which has said it would continue to seek his extradition.

The 41-year-old Australian made his speech from the balcony of the embassy, which was ringed by police, in order to avoid leaving its grounds and being arrested.

But Mr Assange gave no indication of what his next move might be.

He claims the accusations of sex crimes in Sweden against him – made by two female WikiLeaks volunteers – are politically motivated and that he will eventually be extradited to the US.

WikiLeaks enraged Washington by releasing video of a US attack in Iraq, as well as tens of thousands of classified US documents about the wars in Iraq and Afghanistan.

Mr Assange yesterday also called for US soldier Bradley Manning, the alleged source of a massive trove of secret government documents leaked by WikiLeaks, to be released from a military prison.

He claimed Mr Manning “was found by the United Nations to have endured months of tortuous detention” at the US Marine Corps jail in Quantico, Virginia.

While thanking his own supporters, Mr Assange accused police of trying to enter the embassy after he was given asylum.

“Inside this embassy after dark, I could hear teams of police swarming up into the building through its internal fire escape,” he said from the balcony situated just above a line of police officers standing in the street below.

“But I knew there would be witnesses, and that is because of you,” he told around 100 supporters gathered outside the embassy. Britain has said it could invoke a little-used piece of legislation introduced in 1987 that allows it to revoke the diplomatic immunity of an embassy on British soil and go in to arrest Mr Assange.

The warning was seen as a threat by Ecuador, which condemned it. However, Britain now says it would prefer a negotiated solution.

WikiLeaks yesterday hinted that Mr Assange would be willing to meet with Swedish authorities as long as Stockholm guaranteed it would not send him to the US.

“It would be a good basis to negotiate a way to end this matter if the Swedish authorities would declare without any reservation that Julian would never be extradited from Sweden to the USA,” WikiLeaks spokesman Kristinn Hrafnsson said.

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