A UN panel will conclude Wikileaks founder Julian Assange is being arbitrarily detained" in the UK, the Swedish foreign ministry has said. Mr Assange, 44, claimed asylum in London's Ecuadorean embassy in 2012. The Met Police says Mr Assange will be arrested if he leaves the embassy. The Australian was originally arrested in London in 2010 under a European Arrest Warrant issued by Sweden over rape and sexual assault claims. In 2012, while on bail, he claimed asylum inside the Ecuadorean embassy in Knightsbridge after the UK Supreme Court had ruled the extradition against him could go ahead. Mr Assange's Wikileaks organisation posted secret American government documents on the internet, and he says Washington could seek his extradition to the US to face espionage charges if he is sent to Sweden. In the statement, published earlier by Wikileaks on Twitter, Mr Assange said: "Should the UN announce tomorrow that I have lost my case against the United Kingdom and Sweden I shall exit the embassy at noon on Friday to accept arrest by British police ... However, should I prevail and the state parties be found to have acted unlawfully, I expect the immediate return of my passport and the termination of further attempts to arrest me." Last October, Scotland Yard said it would no longer station officers outside the Ecuador embassy following an operation which it said had cost 12.6m. But it said "a number of overt and covert tactics to arrest him" would still be deployed.