The two leaders say they will keep working toward the longer-lasting peace plan that the president has pushed for since taking office.

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.

In a call with President Trump, President Vladimir V. Putin agreed to pause strikes on Ukrainian energy infrastructure for 30 days if Ukraine does the same. That falls short of the unconditional cease-fire Ukraine had already agreed to.