WASHINGTON / MOSCOW - US President Donald Trump said he plans to talk with Russian President Vladimir Putin on Tuesday about settling the conflict in Ukraine, US media reported.

"We're doing pretty well, I think, with Russia...I'll be speaking to President Putin on Tuesday. A lot of work's been done over the weekend," Trump told reporters on board Air Force One during a flight from Florida to Washington on Sunday evening.

Trump, who is working to finalize a 30-day ceasefire agreement between Russia and Ukraine, said that land and power plants will be part of his conversation with the Russian leader.

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"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. 

In Moscow, Kremlin spokesman Dmitry Peskov announced on Monday that preparations are underway for a telephone conversation between Putin and Trump.

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

Earlier, Russian media reported that Trump plans to speak with Putin, with discussions expected to cover territorial issues and the control over a nuclear power plant.