forces captured ukraine's biggest nuclear power plant. the un's political affairs chief has said attacks on nuclear power facilities are contrary to international humanitarian law. the zaporizhzhia facility was shelled this morning triggering a fire. the authorities say the site is secure and radiation levels are normal. the ukrainian foreign ministry say several people have been killed and injured. the plant is in the south east of the country and the biggest in europe. president zelensky has accused moscow of resorting to "nuclear terror" and urged russians to protest. russia has escalated its air campaign against ukrainian cities throughout the last 2a hours. an official in the besieged port of mariupol has accused russia of trying to force it to surrender by creating a humanitarian crisis. he said the city was being shelled continuously. it's facing a third day without water, electricity, or proper sanitation. kharkiv in the north east has been reduced to rubble. and ukraine says at least 50 people were killed by russian air strikes