Russian President Vladimir Putin and his Ukrainian counterpart Petro Poroshenko have discussed possible measures to restore peace to east Ukraine, the Kremlin said in a statement.
The Kremlin added in its statement late Tuesday that both leaders had also agreed to discuss gas supplies during a summit in Milan on October 16-17.
Russia's Gazprom cut gas supplies to Ukraine in June after Kiev failed to pay its gas debts. Europe gets a third of its gas needs from Russia, with around a half being pumped via Ukraine.