From the State Department:
Do not travel to Russia due to the unpredictable consequences of the unprovoked full-scale invasion of Ukraine by Russian military forces, the potential for harassment and the singling out of U.S. citizens for detention by Russian government security officials, the arbitrary enforcement of local law, limited flights into and out of Russia, the Embassy’s limited ability to assist U.S. citizens in Russia, and the possibility of terrorism.
U.S. citizens residing or traveling in Russia should depart immediately. Exercise increased caution due to the risk of wrongful detentions.
The U.S. government’s ability to provide routine or emergency services to U.S. citizens in Russia is severely limited, particularly in areas far from the U.S. Embassy in Moscow, due to Russian government limitations on travel for embassy personnel and staffing, and the ongoing suspension of operations, including consular services, at U.S. consulates.
In September, the Russian government mobilized citizens to the armed forces in support of its invasion of Ukraine. Russia may refuse to acknowledge dual nationals’ U.S. citizenship, deny their access to U.S. consular assistance, subject them to mobilization, prevent their departure from Russia, and/or conscript them.
U.S. citizens should note that U.S. credit and debit cards no longer work in Russia, and options to electronically transfer funds from the United States are extremely limited due to sanctions imposed on Russian banks. There are reports of cash shortages within Russia.
Commercial flight options are extremely limited and are often unavailable on short notice. If you wish to depart Russia, you should make independent arrangements as soon as possible. The U.S. Embassy has severe limitations on its ability to assist U.S. citizens to depart the country and transportation options may suddenly become even more limited.
🚨 February 12 2023: US State Department is warning Americans residing in #Russia they could get conscripted into the Russian army and should depart the country immediately, but carefully, as they can get arrested for trying to leave Russia as well.https://t.co/MgPuH2jqqm
— Igor Sushko (@igorsushko) February 13, 2023