KIEV (AFP) - Tensions rose in Ukraine on Sunday between the authorities and supporters of imprisoned opposition leader Yulia Tymoshenko after a court said an indefinite protest demanding her release was illegal. Some 100 members of the elite Berkut anti-riot police unit were in position on the edge of the tented camp set up by Tymoshenko supporters in central Kiev as rumours spread that the authorities could forcibly remove the protest. In a tense stand-off, around 100 supporters of the ruling Regions Party staged a counter rally.