In a video, titled “House Arrest”, and released by WikiLeaks, they claim that three cameras have been erected to watch who enters and leaves his temporary home.
The video, published today on Telegraph.co.uk, marks his six months on bail. It shows one of the cameras outside the entrance to Ellingham Hall, Norfolk.
Mr Assange has lived there for six months while he fights extradition to Sweden over allegations of sexual crimes, which he denies.
All of the cameras have been installed since Mr Assange moved there in mid-December.
On the video, Sarah Harrison, one of the WikiLeaks’ team, says: “This is one of the three cameras that is outside each entrance of the property.
“We suddenly noticed them appearing since we have been here. We believe they are monitoring everything that goes in and out of the property.”