President Joe Biden said that the movement of any Russian units across the Ukrainian border will be considered an invasion and would be met with a “severe and coordinated economic response” from the U.S. and its allies, writes NBC NEWS.

“I’ve been absolutely clear with President Putin. He has no misunderstanding, any, any assembled Russian units move across the Ukrainian border, that is an invasion”, - Biden told reporters.

“It will be met with a severe and coordinated economic response that I’ve discussed in detail with our allies as well as laid out very clearly for President Putin”, - he added.

Biden’s remarks came after comments he made in a press conference Wednesday predicting that Russia would invade Ukraine, in which he made a distinction between a “minor incursion” and a full-blown attack. Those comments raised concern among foreign policy experts that the U.S. was indicating Putin had some wiggle room in what he could get away with in Ukraine.