Iran’s stockpile of enriched uranium has expanded, and the refinement of the material is nearing weapons-grade levels, according to a confidential report by the United Nations’s nuclear weapons watchdog.

The confidential International Atomic Energy Agency (IAEA) report, viewed by the Associated Press, found Iran possesses 313.2 pounds of uranium enriched to 60 percent, a 45-pound increase from the last watchdog report. Uranium enriched at 60 percent in sufficient amounts is a prerequisite to producing uranium at the 90 percent needed for nuclear weapons, per the IAEA’s definitions.

Overall, Iran’s enriched uranium stockpile totals 13671.5 pounds, an increase of 1489.8 since the IAEA’s last report, according to the AP. In December, the IAEA observed that Iran reversed its slowdown of uranium enrichment that took place in the middle of last year, Reuters reported. Iran claims its nuclear program is entirely peaceful, but Western nations do not see a civilian purpose for uranium enrichment at Iran’s levels.

American and European diplomats are divided on whether to condemn Iran at the IAEA’s upcoming member board meeting, diplomats involved in the discussions told the Wall Street Journal.

The U.S. is reportedly pushing allies to abstain from a censure vote being pushed by the U.K. and France over Iran’s nuclear program. U.S. diplomats have denied the outlet’s reporting.

Tensions between Iran and Western countries have risen due to the U.S. and its allies’ support for Israel’s military campaign against Hamas, a U.S.-designated terrorist group with close ties to Iran.

Earlier this year, Iran escalated its involvement in the conflict by sending a barrage of drones and missiles toward Israel, which the Jewish state defended itself from with assistance from its allies.

Hamas’s civilian massacre on October 7 drew widespread condemnation of Biden’s soft approach towards Iran, especially the White House’s efforts to deliver billions of frozen funds during negotiations over a prisoner swap and Iran’s nuclear program.

Biden’s Iran policy is marred by the ongoing investigation into suspended Iran envoy Robert Malley’s security clearance over matters the White House has hardly discussed publicly. Malley is believed to be closely linked to an Iranian influence ring designed to cultivate pro-regime university scholars during the Obama administration. Republican lawmakers said in a letter last week Malley transferred classified documents to his personal email account and downloaded them onto his personal phone, opening up the possibility of a “hostile cyber actor” obtaining them.

The Biden administration has sought to strengthen its diplomatic ties to Iran in continuation of former president Barack Obama’s approach to Tehran and a reversal from the hardline approach by Biden’s predecessor, former president Donald Trump.

Whistleblowers have recently come forward with allegations Obama’s then-secretary of state, John Kerry, prohibited federal law enforcement from arresting Iranian terrorists during negotiations over the Iran nuclear deal.