The 39-year-old Australian has spent six months at a supporter's rural estate as he fights extradition to Sweden, where he is accused of the rape and sexual assault of two women.
Supporters have released a video claiming police had set up surveillance cameras near the house to record license plates of visiting cars.
Assange's bail conditions require him to wear an electronic tag and report to police daily.
Assange told the Associated Press today that he had become "a fixed target" for snoopers.
He said his house arrest had been "the single largest impediment to our work."
(Published 16 June 2011, 13:25 IST)
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