November 2021—Iran has been producing centrifuge parts at an assembly plant in Karaj, according to The Wall Street Journal.

Tehran has barred IAEA inspectors from the site. Cameras have also been inaccessible since earlier this year.

The parts made at the facility have fed the production of at least 170 centrifuges since late August, according to the report.

IAEA chief Rafael Grossi has expressed concern about lack of access to the Karaj site. Iran is stockpiling highly enriched uranium beyond levels permitted by the 2015 nuclear accord (JCPOA).