Ukrainian President Volodymyr Zelensky on Monday said that he has been informed that Russia will attack on Wednesday.

The comments from the Ukrainian leader, made in an address to his nation posted on Facebook, come amid heightened tensions between Kyiv and Moscow.

“We are told that February 16 will be the day of the attack,” Zelensky said, according to a Facebook translation.

Russia has amassed more than 100,000 troops near the Ukrainian border. The troop buildup had raised concerns among the U.S. and NATO allies that Russia is planning a military incursion, but Moscow has continually denied having any such plans.