Kremlin spokesman Dmitry Peskov announced on Monday that preparations are underway for a telephone conversation between Russian President Vladimir Putin and U.S. President Donald Trump on Tuesday.

"A conversation is being prepared for Tuesday," Peskov said, although he declined to disclose the topics that would be discussed.

Kremlin's comment came after Trump confirmed on Sunday evening that he would talk with Putin on Tuesday. "A lot of work's been done over the weekend," he told reporters on board Air Force One during a flight from Florida to Washington.

"We will be talking about land. We will be talking about power plants," Trump told reporters. "I think we have a lot of it already discussed very much by both sides, Ukraine and Russia."

"We want to see if we can bring that war to an end. Maybe we can, maybe we can't, but I think we have a very good chance," he said.