The Kremlin said Tuesday that Putin would meet with the Ukrainian president in Minsk, as well as officials from the European Commission and the Eurasian Customs Union, which is comprised of Russia, Kazakhstan and Belarus.

Ukrainian President Petro Poroshenko, who confirmed the news in a statement, said that "stabilizing the situation" in eastern Ukraine would be a key topic of discussion.

The Ukrainian statement quoted European Commission President Juan Manuel Barroso as saying that the EU invitation had come from Poroshenko.

Putin and Poroshenko have not met since early June.