Group called New World Hackers also claimed responsibility via Twitter A massive co-ordinated series of cyber attacks has forced hundreds of major websites from Amazon to Twitter offline across the globe - and WikiLeaks believes its supporters were responsible.
It urged its backers to 'stop taking down the US internet', saying: 'Mr Assange is still alive and WikiLeaks is still publishing.'
It then tweeted: 'The Obama administration should not have attempted to misuse its instruments of state to stop criticism of its ruling party candidate.'
The Ecuadorian government switched off Assange's internet service in its UK embassy Sunday after he released another tranche of emails showing the contents of a speech given by Hillary Clinton to Goldman Sachs.
WikiLeaks accused John Kerry and the US Government of asking Ecuador to shut down Assange's internet connection, but the South American country denied it came under any pressure from the US or any other government.
The Department of Homeland Security has already launched an urgent investigation into Friday's crash, amid claims it could be a precursor to an attempt to disrupt the US Presidential election further. 
Wikileaks has already come under fire for its decision to publish around 20,000 emails from John Podesta, Clinton’s campaign chair.
Internet service company Dyn, which controls the 'address book' of the internet for dozens of major companies, said that it had suffered its first denial of service (DDoS) attack shortly after 6AM ET (11AM BST), in an attack that mostly affected the east coast of the US.
It told CNBC the attack is 'well planned and executed, coming from tens of millions of IP addresses at same time.'
It confirmed a second attack at 1PM ET, which appeared to be centered on UK servers, and later said 'several' attacks were underway on servers across the globe, with the west coast being particularly badly hit.
'The complexity of the attacks is what is making it so difficult for us,' said Kyle York, the company's chief strategy officer. 'What they are actually doing is moving around the world with each attack.' He said an East Coast data center was hit first; attacks on an offshore target followed later.
Dyn said Friday evening a third cyber attack 'has been resolved'.
It was not immediately clear who was responsible and Gillian Christensen of the U.S. Department of Homeland Security said the agency was 'investigating all potential causes.'
