Reverend Jesse Jackson has visited WikiLeaks founder Julian Assange inside the Ecuadorean embassy in London.

The civil rights activist, from Chicago spent over an hour talking with Assange at the embassy where he has been living for more than three years today.

The pair appeared together on the balcony of the embassy building.

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Reverend Jesse Jackson (left) has visited WikiLeaks founder Julian Assange inside the Ecuadorean Embassy in London today

Jackson spent over an hour talking with Assange at the embassy where he has been living for more than three years

Assange, 44, sought sanctuary in the embassy in 2012 to avoid extradition to Sweden.

He has not been formally indicted, but is wanted there for questioning on rape allegations.

The Australian has refused to travel to Sweden, saying he fears it would lead to him being extradited to the United States because of an investigation into WikiLeaks' dissemination of hundreds of thousands of classified U.S. documents.

Earlier this month, Foreign Office minister Hugo Swire said Britain would make a formal protest to Ecuador over its decision to provide asylum to the WikiLeaks founder.

WikiLeaks founder Julian Assange (right) spoke with Reverend Jesse Jackson inside the Embassy of Ecuador in London

He said: 'Ecuador must recognise that its decision to harbour Mr Assange more than three years ago has prevented the proper course of justice.'

The comments came after Swedish prosecutors dropped inquiries into three allegations of sexual molestation and unlawful coercion against Assange as they had run out of time to bring charges.

However, they said they would push on with an investigation into an allegation of rape made in 2010 against him.

Assange breached his bail conditions to go to the embassy since 2012.

Police have guarded the building in Knightsbridge in central London round the clock since then -at an estimated cost of more than £10 million ($15.6 million).