WikiLeaks has blamed Ecuador for cutting off founder Julian Assange's internet access while he is holed up at the Ecuadorean Embassy in London, and while his group is releasing thousands of emails from Hillary Clinton's campaign chairman.

Assange has been at the embassy for more than four years after skipping bail to avoid being extradited over sex crimes allegations.

WikiLeaks initially blamed an unidentified "state actor" for cutting off Assange's internet access, then on Monday said in a tweet that it was Ecuador.