TEHRAN, June 4 (Xinhua) -- Iran's nuclear chief warned on Tuesday that the country would take retaliatory actions should certain parties to the 2015 nuclear deal seek to exert pressure or adopt an "anti-Tehran resolution" during the ongoing board meeting of the UN nuclear watchdog.

President of the Atomic Energy Organization of Iran Mohammad Eslami made the remarks in an address to reporters upon arrival at the airport of Shahrekord city in the western Iranian province of Chaharmahal and Bakhtiari.

He said that Iran had notified other parties of its potential reaction, noting, "If the other sides return to their commitments under the nuclear deal, Iran will also fulfill its obligations."

Iran signed the nuclear deal, formally known as the Joint Comprehensive Plan of Action, with world powers in July 2015, accepting restrictions on its nuclear program in exchange for lifting sanctions. However, the United States withdrew from the agreement in May 2018.

Eslami said that Iran was in the phase of scaling back its commitments based on a strategic law passed by the country's parliament in 2020 to counter U.S. sanctions, explaining that the move was prompted by the failure of other parties to the deal, particularly the United States, to honor their commitments under the agreement.

During a meeting of the Board of Governors of the International Atomic Energy Agency (IAEA) in the Austrian capital Vienna on Monday, IAEA Director General Rafael Grossi said Iran's stockpile of enriched uranium continued to increase, with some enriched up to 60 percent.

Reuters reported Monday that Britain, France and Germany had formally submitted a draft resolution against Iran to the IAEA Board of Governors for it to be voted on later this week, which would press Iran to explain uranium traces found at undeclared sites.