The U.S. is warning any American citizen still in Russia to leave immediately.
The State Department has issued its highest advisory — a level 4 — also warning Americans not to travel to Russia.
This is for a host of reasons, including Americans being singled out for detention, unpredictable local law enforcement and terrorism.
Ukraine beefs up defenses along Belarus border — in case Putin wants a do-over
Scripps News visited the border with Belarus, where Ukraine's military and border guard service have built a vast network of trenches.
And because of declining relations between the U.S. and Russia, the State Department says it has fewer options to help Americans who get in trouble over there.
The breakdown in international relations, of course, is due to Russia's invasion of Ukraine.