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.

Iran slammed the International Atomic Energy Agency’s vote as politically motivated. It comes as U.S.-Iran nuclear talks increasingly appear stalled.

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.