VIENNA (AP) — Iran said it has built and will activate a third nuclear enrichment facility, ratcheting up tensions with the U.N. on Thursday immediately after its atomic watchdog agency censured Iran for failing to comply with nonproliferation obligations meant to prevent it from developing a nuclear weapon.

The decision comes as officials say they believe that Israel is preparing to launch a military attack on Iran. Tehran condemned the vote.

The U.N. nuclear watchdog's board of governors declared Iran in breach of its non-proliferation obligations on Thursday and Tehran announced counter-measures, as tensions rose in the Middle East before further U.