NEW YORK (UN), Sept. 4 - UN Secretary-General Ban Ki-moon has welcomed a telephone conversation between Russian and Ukrainian Presidents Vladimir Putin and Petro Poroshenko regarding a step-by-step plan towards peaceful resolution of the conflict in Ukraine, UN Secretary-General spokesperson Stephane Dujarric said.

"The Secretary-General welcomes the news of today's [Wednesday's] contact between Presidents [Vladimir] Putin and [Petro] Poroshenko regarding a step-by-step plan towards peaceful resolution of the conflict in Ukraine," he said at a briefing on Wednesday.