Hours before Putin’s self-declared ceasefire was set to come into effect, Moscow unleashed a barrage of drone attacks across Ukraine. Ukraine’s air force said Russian aircraft targeted the north-eastern Sumy region with guided air bombs after the ceasefire was supposed to begin . Earlier, Zelenskyy said a Russian attack killed a mother and her son in Kyiv on Wednesday. A Russian drone attack also wounded four people in the southern city of Zaporizhzhia , Ukraine’s national police said. The Kremlin was forced on Wednesday to say it was taking “all necessary measures” to ensure the safety of foreign leaders due...