Western nations are planning to table a resolution at an IAEA meeting that will find Iran in non-compliance with its so-called safeguards obligations for the first time in 20 years, a senior western diplomat said.

The IAEA held a board session Wednesday on Iran's nuclear program, during which Britain, France, and Germany warned Iran that its escalating nuclear activities—such as 60 percent enrichment of uranium and expansion of centrifuge and stockpile limits—undermine the JCPOA, a 2015 deal with Iran, but did not call for immediate punitive steps.

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 announced Thursday it will launch a new uranium enrichment facility after the United Nations nuclear watchdog determined the country was not in compliance with its nuclear obligations. The