Moscow, Sha'ban 24, 1436, Jun 11, 2015, SPA -- The conflict in Ukraine is not a civil war, said Ukrainian President Petro Poroshenko Thursday as he visited the government stronghold of Mariupol in the country's troubled Donetsk region, dpa reported. "Those who are located on occupied territory amid this humanitarian catastrophe are to me hostages - an aggressor's hostages who are entitled to liberation. This is our sacred duty," Poroshenko said in comments carried by Interfax-Ukraine. Poroshenko stopped short of naming the aggressor. -- SPA 22:29 LOCAL TIME 19:29 GMT www.spa.gov.sa/w