NAIROBI, Kenya: The African Union on Thursday (Friday in Manila) condemned Russia's attack on Ukraine and called for an 'immediate ceasefire,' saying the situation risked escalating into 'a planetary conflict.' The bloc's current chairman, Senegalese President Macky Sall, and Moussa Faki Mahamat, chairman of the African Union Commission, said in a joint statement they were 'extremely concerned' by the invasion. They called on Russia to 'respect international law, the territorial integrity and national sovereignty of Ukraine.' Russia launched a full-scale invasion of Ukraine on Thursday, killing dozens as airstrikes hit military installations and ground forces moved in from the north, south and east.