WikiLeaks tweeted after the Swedish announcement: "UK refuses to confirm or deny whether it has already received a U.S. extradition warrant for Julian Assange".
The statement, however, noted that Assange was "wanted for a much less serious offence" than before and said the force would "provide a level of resourcing which is proportionate to that offence". "The Metropolitan Police Service is obliged to execute that warrant should he leave the embassy".
"Detention and extradition without charge has become a feature of the EU".
"When he was speaking he talked about another major victory: Chelsea Manning being released from jail 28 years early because her sentence had been commuted". That is not something I can forgive, it is not something I can forget.
Sweden's top prosecutor Marianne Ny said in a statement earlier Friday that she has made a decision to discontinue the investigation about sex-crime allegations against Assange from two women.
February 5: Assange claims "total vindication" as the U.N. Working Group on Arbitrary Detention finds that he has been unlawfully detained and recommends he be immediately freed and given compensation.
That threat was still looming, according to a tweet by WikiLeaks: "UK states it will arrest Assange regardless & refuses to confirm or deny whether it has already received an extradition request from the US".
He said that recent statements by U.S. President Donald Trump and Attorney General Jeff Sessions indicating that United States authorities would seek to arrest Assange were a sign that he still faces persecution outside Britain.
WikiLeaks also had a role in the 2016 US presidential campaign when it published emails written by Hillary Clinton's campaign officials. He spoke of Friday's announcement as a "vindication" and an "important victory", thanking the Ecuadorean people but also warning that "the proper war is just commencing".
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The lawyer for Assange's accuser also expressed outrage Friday - though for a very different reason.
Meanwhile, Ecuadorian Foreign Minister Guillaume Long urged Britain to "grant safe passage" out of the country to Assange.
He said he was prepared to talk to United Kingdom and U.S. authorities about his position, despite "extremely threatening remarks" being made.
The U.S. Department of Justice declined to comment on Friday's developments.
Asked if London would now support a request to extradite Assange to the United States, British Prime Minister Theresa May said: "We look at extradition requests on a case-by-case basis".
"It is a scandal that a suspected rapist can escape justice and thereby avoid the courts", the lawyer, Elisabeth Fritz, told AFP in an email.
August 20: Swedish prosecutor issues arrest warrant for Assange based on one woman's allegation of rape and another woman's allegation of molestation. "In order to proceed with the case, Julian Assange would have to be formally notified of the criminal suspicions against him", the statement reads in part.
The second woman, who attended the event, reportedly had sex with Assange once after insisting he use a condom (which he did "unwillingly"), and later woke up to him having sex with her without a condom.
The 45-year-old Australian has always denied the allegations, which he feared would lead to him being extradited to the USA and facing trial over the leak of hundreds of thousands of secret American military and diplomatic documents.