The United Nations Security Council is set to hold a closed-door meeting on Wednesday to discuss Iran’s growing stockpile of uranium, which is nearing weapons-grade levels, diplomats revealed on Monday. Six of the council's 15 members, France, Greece, Panama, South Korea, Britain and the United States, requested the meeting.

Diplomats said they also want the council to address Iran’s responsibility to share with the U.N. nuclear watchdog, the International Atomic Energy Agency, "the information necessary to clarify outstanding issues related to undeclared nuclear material detected at multiple locations in Iran."

Iran’s U.N. mission in New York did not immediately answer a proposition for comment on the upcoming meeting. While Iran insists it has no intention of developing nuclear weapons, the IAEA has warned that the country is rapidly increasing uranium enrichment to 60% purity, just short of the 90% needed for nuclear weapons. Western nations argue that such high levels of enrichment are unnecessary for civilian purposes and point out that no country has done so without eventually building nuclear bombs. Iran, however, maintains that its nuclear program is purely for peaceful purposes.

In 2015, Iran reached an agreement with Britain, Germany, France, the U.S., Russia, and China called the Joint Comprehensive Plan of Action (JCPOA). Under this agreement, sanctions on Iran were lifted in exchange for limits on its nuclear program. However, in 2018, during Donald Trump’s first term as U.S. president, Washington withdrew from the agreement, prompting Iran to step back from its nuclear commitments gradually.

Britain, France, and Germany have informed the U.N. Security Council that they are prepared to reinstate all international sanctions on Iran if necessary to stop the country from developing a nuclear weapon. However, their authority will expire on October 18 of this year when the 2015 U.N. resolution related to the nuclear deal ends. Meanwhile, U.S. President Donald Trump has instructed his U.N. envoy to collaborate with allies to restore these sanctions and restrictions on Iran.