U.S. intelligence agencies believe that Iran is prepared to launch terrorist attacks inside the United States in response to perceived threats from America and its allies, the U.S. spy chief said Tuesday.

That plot “shows that some Iranian officials — probably including Supreme Leader Ali Khamenei — have changed their calculus and are now more willing to conduct an attack in the United States in response to real or perceived U.S. actions that threaten the regime,” Clapper said in the testimony, which was submitted to the Senate Intelligence Committee in advance of a threat assessment hearing Tuesday. “We are also concerned about Iranian plotting against U.S. or allied interests overseas.”

Iran has blamed the United States and Israel for a series of mysterious developments, including the apparently targeted killing of yet another Iranian nuclear scientist in Tehran on Jan. 11, as well as a crippling cyber attack on the country’s largest uranium enrichment facility.