US President Joe Biden and Russian President Vladimir Putin will hold talks via video conference on Tuesday, the Kremlin said, amid rising tensions over Ukraine.
This comes after US Secretary of State Anthony Blinken said his country had evidence that Russia had drawn up plans for a “large-scale” attack on Ukraine.
He said it was not clear whether Putin had made a final decision to invade.
Russia denied any such intention, and accused Ukraine of massing its forces.
Ukraine says Russia has deployed armored vehicles, electronic warfare systems and 94,000 troops along their common border.
It is the largest buildup of Russian forces on its border since Russia annexed Crimea from Ukraine in 2014.
Ukrainian Defense Minister Oleksiy Reznikov, citing intelligence reports, said that Moscow may plan to launch a military offensive at the end of January.
The movement of Russian forces further strained relations between Russia and the United States.
On Friday, Biden warned that it would make it “extremely difficult” for Putin to “go ahead and do what people are worried he might do.”
The United States and its European allies have discussed imposing sanctions on Russia if it takes aggressive measures against Ukraine.
While Ukraine is not a member of the North Atlantic Treaty Organization (NATO), it has close ties with the bloc and has acquired Western weapons, including US Javelin anti-tank missiles.
Russian officials deny any plans to invade, and say their forces are at the border to conduct military exercises.
Moscow accused NATO of engaging in provocative behavior by holding exercises in the Black Sea, off the Crimean peninsula. The Russian Foreign Ministry also said Ukraine had sent 125,000 troops to the common border. Kiev declined to comment on this claim.
“We have to be vigilant” about the potential for conflict in the region, Britain’s chief of staff said over the past week.
General Nick Carter told the BBC he really hoped there would be no war with Russia, but added that NATO must be prepared for that possibility.
Tensions between Russia and Ukraine are nothing new. In 2014, Russia annexed Ukraine’s Crimea and soon after began supporting a separatist rebellion in eastern Ukraine.
Most recently, Ukrainian President Volodymyr Zelensky imposed sanctions on a strong friend of President Putin and banned three pro-Russian TV stations from broadcasting.
Presidents Biden and Putin held their only face-to-face talks in Geneva in June. Reuters reported that the last phone call between them was on July 9.