The Kremlin is rejecting reports that President Vladimir Putin spoke last week with President-elect Donald Trump about the war in Ukraine, and a spokesman for Trump refused to comment on what he called his “private calls” with world leaders.

During the call, which Trump took from his resort in Florida, he advised the Russian president not to escalate the war in Ukraine and reminded him of Washington’s sizable military presence in Europe, said a person familiar with the call, who, like others interviewed for this story, spoke on the condition of anonymity to discuss a sensitive matter.