Russia launched a sweeping drone assault across Ukraine, targeting multiple regions, officials said, after U.S. President Donald Trump cast doubt over Russian President Vladimir Putin’s willingness to end the war.

“President Trump and I have a clear message to those in our country illegally: LEAVE NOW,” said Kristi Noem, the homeland security secretary, in a statement on Monday. “If you do not self-deport, we will hunt you down, arrest you and deport you.”