Jews in the eastern Ukrainian city of Donetsk where pro-Russian militants have taken over government buildings were told they have to "register" with the Ukrainians who are trying to make the city become part of Russia, according to Israeli media.
USA Today: Jews ordered to register in east Ukraine

A leaflet provided by the Coordination Forum for Countering Antisemitism shows a leaflet distributed in Donetsk, Ukraine, that calls for all Jewish people over 16 years-old to register as Jews. The leaflet demanded the city's Jews supply a detailed list of all the property they own, or else have their citizenship revoked, face deportion and see their assets confiscated.