Scuffles have broken out in Ukraine as opposition parties and government supporters held separate rallies in Kiev.A group of people hurled stones and plastic bottles at oppposition supporters before being pushed away by police in riot gear. Opponents of President Viktor Yanukovych have been rallying against what they call an increasingly authoritarian state. They are also demanding the release of former prime minister Yulia Tymoshenko. Al Jazeera's Peter Sharp reports.
