Mariupol (, ; ) is a city of regional significance in southeastern Ukraine, situated on the north coast of the Sea of Azov at the mouth of the Kalmius river. It is the tenth-largest city in Ukraine and the second largest in the Donetsk Oblast. Population: . Following the capture of Donetsk city by pro-Russian insurgents associated with the Donetsk People's Republic in 2014, Mariupol was made the provisional administrative centre of Donetsk Oblast. The city was retaken on June 13, 2014 by government troops and has been under heavy bombardment and the fighting has intensified as of August 2015.