Fighting between troops and pro-Russian separatists in Ukraine's southeastern city of Mariupol killed 21 people on Friday, Interior Minister Arsen Avakov said.
A file picture taken on April 17, 2014 shows a pro-Russian activist guarding a barricade outside the local government building in Ukraine's southeastern port city of Mariupol
The violence killed 20 insurgents and one police officer, he said on his official Facebook page, adding that five policemen were wounded and four rebels were captured.