Ukrainian President Volodymyr Zelenskiy said during a surprise visit to Finland that this year will be "decisive" At least 21 people were killed and 48 wounded in "heavy" Russian shelling on Wednesday on Ukraine's Kherson region. Ukrainian authorities announced a 58-hour curfew in the city from Friday evening as Kiev says it has completed preparations for a large-scale offensive.

Russia and Crimea have been hit by a series of attacks for which Kiev has not claimed responsibility.