Donald Trump said he could announce details of a temporary ceasefire in Ukraine as early as Tuesday when he is due to speak with Vladimir Putin.

The two leaders will speak by phone, officials confirmed, after the US and Russia held behind-the-scenes talks over the weekend.

“I’ll be speaking to President Putin Tuesday. A lot of work’s been done over the weekend,” the US president told reporters on Air Force One on Sunday night.

“We’re doing pretty well, I think, with Russia. We’ll see if we have something to announce by Tuesday.”

Putin rejected an early offer of a ceasefire last week, saying he had “questions” about the deal and whether it met some of Russia’s key demands.