"We call on you to act in accordance with national and international law, human rights and the rule of law by bringing an end to the ongoing extradition proceedings and granting Mr. Assange his long overdue freedom – freedom from torture, arbitrary detention and deprivation of liberty, and political persecution," the letter reads.
The open letter has been signed by current Venezuelan President Nicolas Maduro and the president of Argentina, Alberto Fernandez, according to the Lawyers For Assange portal, which has published the open letter.
Other notable supporters of the letter include the former prime minister of Spain, Jose Luis Zapatero, former UK Labour leader Jeremy Corbyn, and Evo Morales, ex-president of Bolivia.
A Press-Gazette survey published this past Thursday found that almost six in ten readers of the magazine believe that the UK government should intervene to stop the ongoing extradition proceedings.