 Meanwhile, on February 28, another major rally was held in Belgrade, where the chants "We want weapons" and "Arrest Vllasi" were heard, and three days later, Vllasi was indeed placed under arrest.In early 1989, the Parliament of Serbia had proposed constitutional amendments that would have significantly reduced SAP Kosovo's autonomous status within SR Serbia.Kosovo Albanians organized large demonstrations against these moves, but in March 1989, preceding a final push for the ratification of constitutional changes in the Assembly of Kosovo, the Yugoslav police rounded up around 240 prominent Kosovo Albanians, apparently selected based on their anti-ratification sentiment, and detained them with complete disregard for due process.