Ecuador says WikiLeaks founder Julian Assange has been barred from using the internet at the Ecuadoran Embassy in London for interfering in other countries' affairs.
The Ecuadorian government said he violated an agreement with the embassy, where he has been holed up for nearly six years, to not comment on international issues online.
It added his recent activity on social media put Ecuador's good relations with the UK, EU and other nations at risk.
Assange recently expressed strong support for separatist leaders in Spain's Catalonia region and decried the arrest of former Catalan leader Carles Puigdemont.
He also was engaged in a heated clash of words with a British minister on Twitter, questioning London's claim that Russia was behind the poisoning of a former Russian spy in Salisbury.
Assange sought refuge at the embassy in 2012 to avoid extradition to Sweden on alleged sex crimes - an investigation that has now been closed.
He is still wanted in Britain for jumping bail.