There was also no immediate confirmation from the Senate committee.
Leaders from the Senate Intelligence Committee sent a letter to Wikileaks founder Julian Assange to ask him to testify in a closed briefing with committee staff.
"Neither Robert Mueller's team nor the US Senate Intelligence Committee has bothered to contact WikiLeaks or me, in any manner, ever", Assange wrote on Twitter in September previous year. The letter says the committee requests Assange make himself available for a closed-door interview "at a mutually agreeable time and location".
Anderson expressed concern after the Ecuadorean embassy in London had revoked Assange's visitor privileges and Internet access, saying she was anxious about his health and well-being, The New York Post's Page Six reported.
Wikileaks legal team, the organization's Twitter account said, is "considering the offer but the conditions must conform to a high ethical standard".
"According to Moreno, Ecuadorian authorities are now in talks with Assange's lawyers to work out an agreement that would ensure the security of the WikiLeaks' founder "'in line with the norms of worldwide law".
Sweden dropped its investigation into Assange over allegations of sexual offenses in May 2017.
Assange believes that would pave the way for extradition to the United States for the publication of a huge cache of US diplomatic and military secrets on the WikiLeaks website.
Britain has said it will arrest Assange if he leaves the embassy as he skipped bail in order to take refuge in the building.
"If the British government guarantees us that he will not run the risk of being extradited to another country, we will ask Mr. Assange (to leave); we will talk first with his attorneys", Moreno said.
His testimony could be useful to special counsel Robert Mueller, who is leading the "bipartisan" investigation into Russian meddling Trump has branded a "witch hunt".