As of June 1, Ukraine may no longer allow men with dual U.S.-Ukrainian citizenship aged between 18 and 60 to leave the country, the U.S. Embassy in Ukraine said on June 4. American embassy officials advised men with dual citizenship not to travel to Ukraine.

Kyiv does not recognize dual U.S.-Ukrainian citizenship. Therefore, men with dual status are subject to the same mobilization measures as other Ukrainian citizens.
"Previously, dual U.S.-Ukrainian citizens in this group could enter and then depart Ukraine if they had deregistered their Ukrainian residency and registered their U.S. residency," the Embassy statement reads.
"According to our information, this exception was revoked as of June 1."