WikiLeaks founder Julian Assange has received a mysterious visit from Australian High Commission officials in London overnight.

Two officials on Thursday local time went to the Ecuadorian embassy in London where Mr Assange has been living for almost six years.

No explanation has been given for their visit.

His internet and phone connections were cut off by the Ecuadorian government six weeks ago and he was denied visitors.

The Australian-born campaigner fears being extradited to the US if he leaves the embassy and being questioned about the activities of WikiLeaks.

It is believed to be the first time officials from the Australian High Commission in London have visited him.

Jennifer Robinson, a member of Mr Assange’s legal team, said: “I can confirm we met with Australian government representatives in the embassy today.

“Julian Assange is in a very serious situation, detained without charge for seven-and-a-half years.

“He remains in the embassy because of the risk of extradition to the US.
“That risk is undeniable after numerous statements by Trump administration officials, including the director of the CIA and the US attorney-general.

“Given the delicate diplomatic situation we cannot comment further at this time.”

Mr Assange first entered the Ecuadorian embassy on June 19, 2012, after he had exhausted his appeals against an extradition order face rape and sexual assault allegations in Sweden. 

Swedish authorities have since closed their investigation, saying the case could not go forward in the absence Mr Assange.

Mr Assange still faces arrest if he steps out of the Ecuadorian embassy for breach of his bail conditions after failing in a legal bid earlier this year to have the warrant cancelled by an English court.

Swedish authorities have dropped their investigation, but Mr Assange believes he will be extradited to the United States for questioning over the activities of WikiLeaks if he leaves the building.

UK Foreign Office Minister Sir Alan Duncan branded Mr Assange a “miserable little worm” during a parliamentary debate in March, adding he should leave the Ecuadorean embassy and surrender to British justice.

Mr Assange replied: “Britain should come clean on whether it intends to extradite me to the United States for publishing the truth and cease its ongoing violation of the UN rulings in this matter.”

Days later, the Ecuadorian government said it had cut off Mr Assange’s internet access was denying him visitors because he had breached “a written commitment made to the government at the end of 2017 not to issue messages that might interfere with other states”.

-with AAP