Ukraine and Russia have held their fourth round of negotiations for a cease-fire, an adviser to Ukraine's president said Monday, as Moscow's invasion of the East European country enters its third week with civilian casualties growing.The talks paused later Monday and will continue Tuesday, Reuters reported, quoting Mykhailo Podolyak, adviser to Ukrainian President Volodymyr Zelenskyy. The pause is for "additional work in the working subgroups and clarification of individual definitions. Negotiations continue," he was quoted as saying.The parties are engaged in "negotiations...on peace, ceas…READ FULL ARTICLE