DUBAI, United Arab Emirates — Iran’s enriched uranium stockpile has far exceeded the level allowed by its international nuclear deal, an aide to Iran’s nuclear chief said on Saturday.

Ali Asghar Zarean said that Iran has stockpiled 1,200 kilograms, or about 2,600 pounds, which is well beyond what the 2015 nuclear deal between Tehran and world powers allowed.

“Iran is increasing its stockpile of the enriched uranium with full speed,” he said. The claim has not been verified by the U.N.’s nuclear watchdog.

In November, the International Atomic Energy Agency said Iran’s stockpile of low-enriched uranium had grown to 372.3 kilograms (821 pounds) as of Nov. 3. The nuclear deal limited the stockpile to 202.8 kilograms (447 pounds).