'Colossal damage' to power grid reported as Russia rains missiles across UkraineBoth Ukrainian and Russian officials report civilian casualties in latest strikes from airRussian missiles doing 'colossal damage' to energy grid: Kharkiv mayorRussia fired more than 70 missiles at Ukraine on Friday in one of its biggest attacks since the start of the war, knocking out power in the second biggest city and forcing Kyiv to bring in emergency blackouts nationwide, Ukrainian officials said.Reuters was unable to immediately verify the latest battlefield accounts but recorded at least three explosions in the snow-covered capital Kyiv, with smoke billowing over part of the city.WATCH l Ukraine prepares for tough stretch with below-zero forecasts:Ukraine says Putin preparing major offensive for the new yearBoth sides have ruled out a Christmas truce and there are currently no talks aimed at ending the conflict, Europe's largest since the Second World War.The Russian defence ministry issued video on Friday showing joint exercises by Russian and Belarusian troops in Belarus, using tanks and machine guns as well as drones and practising crossing a river.With the invasion now in its 10th month, European Union leaders agreed on Thursday to provide 18 billion euros ($26 billion Cdn) in financing to Ukraine next year and hit Moscow with a ninth package of sanctions."