President Obama’s top diplomat to Europe has been caught on tape saying “F–k the EU.”

The conversation between Assistant Secretary of State Victoria Nuland and U.S. Ambassador to the Ukraine Geoffrey Pyatt was anonymously leaked on YouTube.

Nuland and Pyatt are not identified on the recording, but the tape appears to be genuine.

Nuland is a former spokeswoman for the State Department, and her voice can be recognized on the tape. The State Department has not denied that the voices are those of Nuland and Pyatt.

It’s not clear who recorded or leaked the call, though speculation has immediately fallen on Moscow.