At least four people were killed and 15 more were wounded in a combined Russian missile and drone attack on Ukraine’s Kyiv region overnight, Ukrainian President Volodymyr Zelenskyy said on Saturday. ADVERTISEMENT ADVERTISEMENT Three of the wounded were in critical condition, of whom two were undergoing surgery, regional administration head Mykola Kalashnyk reported. The attack hit four districts, damaging residential buildings, educational institutions, enterprises and critical infrastructure, Kalashnyk said in a social media post, adding…