In the Ukrainian city of Slaviansk pro-Russian separatists are proclaiming a regional republic.<br/> <br />They're here in support of fellow separatists refusing to leave public buildings they've occupied despite an international agreement to end such actions.<br/> <br />In Moscow President Vladimir Putin attends a church service for Easter commemorating the resurrection of Jesus Christ.<br/> <br />Ukraine's prime minister says he's worried how far Putin might go to resurrect the former Soviet Union.<br/> <br />(SOUNDBITE)(English) UKRAINE PRIME MINISTER ARSENY YATSENIUK SAYING:<br/> <br />"I believe that you do remember his famous Munich speech saying that the biggest disaster of the former century is the collapse of the Soviet Union. I consider that the biggest disaster of this century would be the restoring of the Soviet Union under the auspices of President Putin."<br/> <br />Mediators from the Organisation for Security and Co-operation in Europe arrived in Kiev on Saturday on a mission to ease the tensions.
