"I can say that during the last month, we had two conversations [with Russian President Putin - ed.], and they were entirely devoted to the release of hostages," Poroshenko said.
"Dozens of Ukrainians have been arrested and are being held in Russian prisons just because they have Ukrainian passports. Hundreds of Ukrainians are being held in the basements in occupied territories as hostages of criminal power," the Ukrainian president noted.
"We insist on respecting the Minsk agreements, including in terms of the immediate release of hostages," Poroshenko concluded.