US says it 'doesn't know' who's behind anti-Semitic flyers in Ukraine

The Untied States government has now told the Los Angeles-based Simon Wiesenthal Center that it 'doesn't know' who is behind anti-Semitic flyers calling on Jews to 'register' their persons and property or face deportation. This is from the first link.

In response to an email query, Ambassador Geoffrey Pyatt told the
Wiesenthal Center that the fliers were “clearly part of a general effort
to