Assange Photo:Xinhua

Julian Assange's brother said Monday he feared the Wikileaks publisher would not survive the US' attempts to prosecute him after his fiancee revealed he had suffered a mini-stroke.

Gabriel Shipton was among about 30 people, including Pink Floyd's Roger Waters and actress Susan Sarandon, to rally in support of Assange outside the British consulate in New York.

The protest came a day after Assange's fiancee Stella Moris said Assange had suffered a mini-stroke in late October, on the first day of a US government appeal against a ruling blocking his removal.

The demonstrators were protesting against a decision on Friday by British appeals judges to overturn the ruling after accepting US government assurances that Assange would receive appropriate treatment and not be held in punishing isolation in custody.

"Very worried about it," Shipton told AFP. "This hanging over Julian's head just increases the pressure on him now. 

"So we live in fear that he won't make it through this or that he will die basically, during this process," he added.

The US wants to put Assange on trial for WikiLeaks' publication of thousands of top-secret military documents about the US wars in Afghanistan and Iraq.

Assange's lawyers have previously raised concerns about the effects of his lengthy incarceration on his physical and mental health in a bid to halt the extradition.

AFP