Ukrainian President Petro Poroshenko views the Minsk format of negotiations on resolving the situation in southeastern Ukraine as the most acceptable one, which he made clear at a joint press conference with U.S. Vice President Joseph Biden in Kyiv on Friday.

"We have come to an absolute agreement that the most acceptable basic format for ensuring a peace process is the Minsk negotiating format, a trilateral contact group in which we should implement several key provisions of the Minsk peace plan," Poroshenko said at a joint press conference with Biden in Kyiv on Friday.

He noted that these key provisions involved immediate ceasefire, the creation of a buffer zone, the immediate withdrawal of the Russian-led militants from the front line, the closure of borders, the withdrawal of military and armored vehicles and the immediate start of a political process through the holding of local elections according to the Ukrainian legislation in the temporarily occupied territory of Donetsk and Luhansk regions.