Attorney General Pam Bondi warned Monday that the Justice Department is actively investigating “countless” threats to the United States, as concerns mount over potential Iranian sleeper cells and rising instability in the Middle East.

During testimony before the House Appropriations Committee, Bondi said she could not disclose classified intelligence regarding suspected sleeper cells but confirmed her department is on “high alert” after President Donald Trump’s airstrikes on Iranian nuclear sites over the weekend prompted retaliation from Tehran Monday.