Ecuador's president, Lenín Moreno, was assured by two British foreign secretaries that Julian Assange would not be extradited to a country where he could face the death penalty, according to letters seen by the Guardian.
Robinson says Assange has had "a very hard time" since Moreno came to power in 2017.
Assange, 47, was taken from Ecuador's London embassy by British police last Thursday after Ecuador withdrew his political asylum, ending a stay of nearly seven years.
The WikiLeaks founder is in custody in London awaiting sentencing for breaching his British bail conditions in 2012 by seeking refuge in the Ecuadoran embassy to avoid extradition to Sweden.
"It is unfortunate that, from our territory and with the permission of authorities of the previous government, facilities have been provided within the Ecuadorian embassy in London to interfere in processes of other states", Lenin Moreno told The Guardian newspaper on Sunday. Sweden is considering reviving the investigation.More news: Mueller report on Trump, Russia expected to be released Thursday
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In a video announcement after Assange's arrest, Moreno accused Assange of "discourteous and aggressive behaviour" inside the embassy, and said that WikiLeaks made "hostile and threatening declarations" during Assange's time in the embassy.
But he said the hacking group Anonymous, which has taken credit for cyberattacks on government institutions in the United States and Britain, had made a threat.
Ecuador's Moreno ended Assange's protected status after more than 6½ years and opened the way for his arrest.
Moreno, who was less sympathetic to Assange's cause than his left-wing predecessor Rafael Correa, had requested that he limit his online political presence, stop riding his skateboard in the embassy hall's and clean up after his cat. More than 70 British legislators have urged Javid to give priority to a case involving rape allegations ahead of the US request.
Ecuador grew exhausted of Assange's antics and his continued work with Wikileaks from inside the embassy, opting to bounce him last Thursday.
Patricio Real, Ecuador's deputy minister for information and communication technologies, said the attacks, which began on Thursday, had "principally come from the United States, Brazil, Holland, Germany, Romania, France, Austria and the United Kingdom", as well as from the South American country itself. In the meantime, he is expected to seek prison medical care for severe shoulder pain and dental problems, WikiLeaks has said.