Iran has stopped dismantling centrifuges in two uranium enrichment plants, state media reported on Tuesday, November 10, days after conservative lawmakers complained to President Hassan Rouhani that the process was too rushed, Reuters reports.

Last week, Iran announced it had begun shutting down inactive centrifuges at the Natanz and Fordow plants under the terms of a deal struck with world powers in July that limits its nuclear program in exchange for easing sanctions.

"The (dismantling) process stopped with a warning," Ali Shamkhani, Secretary of the National Security Council, was quoted as saying by the ISNA student news agency.

Only decommissioned centrifuges were being dismantled to begin with, of which there were about 10,000 at Natanz and Fordow, the Atomic Energy Organisation of Iran has said.

Shamkhani did not specify what he meant by "warning", but the head of parliament's nuclear deal commission, Alireza Zakani, told Mehr news agency that the dismantling had stopped in Fordow because of the lawmakers' letter to Rouhani.

Zakani, who was not one of the signatories of the letter, did not mention activities at Natanz.

Khamenei has said that the deal should only be implemented once allegations of past military dimensions (PMD) of Iran's nuclear program had been settled.

The International Atomic Energy Agency is expected to announce its conclusions on PMD by Dec. 15.