Russian President Vladimir Putin agreed on Tuesday to stop attacking Ukrainian energy facilities temporarily but declined to endorse a full 30-day ceasefire that President Donald Trump hoped would be the first step toward a permanent peace deal.

The call between Trump and Putin has started, a senior White House official has confirmed. In a tweet, White House Deputy Chief of Staff Dan Scavino said that Trump is "currently" talking to Putin, with the call starting at 10:00 EDT (14:00 GMT). "The call is going well, and still in progress," he said.

It was not immediately clear whether Ukraine would sign off on the agreement for a 30-day halt on strikes on energy and infrastructure, since Kyiv agreed last week to a more extensive U.S.-proposed ceasefire.