Due to illness, Mr Assange has not appeared, even via video link, at a British court hearing, as he tries to fight extradition to the United States over allegations he conspired to break into a classified computer.
He has been moved to a medical ward in London's Belmarsh prison.
His next hearing will take place on the 12th of June, and may be held in jail.
Wikileaks is condemning Swedish authorities for refusing to postpone a court hearing for Mr Assange, pertaining to the rape case against him that country, that is scheduled for June the 3rd.
