Russia could begin a military offensive in Ukraine “as soon as early 2022,” according to a media report that quoted new US intelligence findings. US Army Chief of Staff General James McConville said Saturday that “somewhere around 95,000 to 100,000 Russian soldiers” were on the border of Ukraine. “I don’t know what they’re going to do. But I am very, very concerned about their posture, and it’s in the news,” McConville said, while speaking on a panel at the Reagan National Defense Forum, CNN reports.

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“That gives a lot of options to the Russians, and I’m not quite sure what they’re going to do. But to me, that is a terrible … It’s going to have a terrible impact on the stability and security of our European friends, and so I have serious concerns about that.”

US President Joe Biden will have a “secure video call” on Tuesday with his Russian counterpart Vladimir Putin, White House press secretary Jen Psaki said in a statement Saturday.

“The leaders will discuss a range of topics in the U.S.-Russia relationship, including strategic stability, cyber, and regional issues,” Psaki said. “President Biden will underscore U.S. concerns with Russian military activities on the border with Ukraine and reaffirm the United States’ support for the sovereignty and territorial integrity of Ukraine.”

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And intelligence findings, first reported by the Washington Post, say Russia could begin the offensive “as soon as early 2022” with 100 battalion tactical groups, which is twice the scale of forces Russia built up in the region last spring. Half those units are currently near Ukraine’s border, the intelligence finds.

Biden on Friday voiced deep concerns about the intelligence findings. “We’ve been aware of Russia’s actions for a long time,” he said as he left for Camp David. “My expectation is we’re going to have a long discussion with Putin.”