Iran said it was suspending cooperation with the U.N. atomic agency, denying international inspectors the chance to assess the damage done by U.S. and Israeli airstrikes on its main nuclear sites and setting up a new clash with Washington and other Western powers.

“The Atomic Energy Organization of Iran will suspend its cooperation with the International Atomic Energy Agency until the security of nuclear facilities is guaranteed,” Mohammad Bagher Ghalibaf, speaker of the parliament, said in a statement, according to the Iranian Fars News Agency.