Negotiations in the Normandy format may follow an upcoming meeting of the trilateral contact group in Minsk, Ukrainian President Petro Poroshenko says.

"An agreement has been achieved [during a telephone conversation with German Chancellor Angela Merkel, French President Francois Hollande, and Russian President Vladimir Putin] that, following a meeting of the trilateral contact group, we will have another conversation in the Normandy format so as to ensure progress in the implementation of the Minsk agreements," Poroshenko said at a press conference following negotiations with Polish President Bronislaw Komorowski in Warsaw on Wednesday.

Poroshenko did not clarify whether he implied a meeting or a telephone conversation in the Normandy format.