"The (IAEA) Director General Rafael Grossi stresses that Iran's decision not to allow agency access to the TESA Karaj centrifuge component manufacturing workshop is contrary to the agreed terms of the joint statement issued on Sept.12,” the International Atomic Energy Agency said in a statement.

"Iran from Sept.20–22 permitted IAEA inspectors to service identified agency monitoring and surveillance equipment and to replace storage media at all necessary locations in Iran with the exception of the centrifuge component manufacturing workshop at the TESA Karaj complex," the IAEA statement added.

That workshop was the victim of apparent sabotage in June in which one of four IAEA cameras there was destroyed. Iran has not returned that camera's "data storage medium" and the IAEA said in a report this month it had asked Iran to locate it and explain. Under the deal the IAEA was due to replace its cameras.