Iran has announced the shutdown of several International Atomic Energy Agency (IAEA) surveillance cameras at Iranian nuclear facilities.
The cameras were a "gesture of goodwill" but were "considered an obligation" by the IAEA, the Iranian nuclear agency said on Wednesday.
The shutdown was preceded by tensions between Iran and Western countries that had lasted for weeks.
On Tuesday, Germany, France and Great Britain, the three European signatory states to the 2015 nuclear agreement, submitted a draft resolution to the IAEA together with the USA in which they accused Iran of lacking cooperation.
The IAEA Board of Governors is scheduled to discuss the draft by Friday at the latest.
If the Board of Governors agrees, it would be the IAEA's first reprimand to Iran since 2020.
The criticism from western countries goes back to the publication of the most recent IAEA report just over a week ago.
In it, the IAEA had mentioned, among other things, open questions about traces of enriched uranium in three Iranian nuclear facilities, which Iran had therefore not reported.
The head of the Iranian nuclear authority, Mohammed Eslami, rejected the information on Wednesday.
Iran has "no covert or undocumented nuclear activities or undisclosed locations," he said, according to the state news agency IRNA.
The West is trying to put "maximum pressure" on its country.
The Western states' resolution was "politically motivated" and Iran had always cooperated fully with the IAEA.
In March, talks between Iran and Western countries about a new nuclear deal stalled.
The international nuclear deal of 2015 assured Iran that sanctions would be eased.
To do this, Tehran should limit its nuclear program.
The United States unilaterally withdrew from the agreement under former President Donald Trump in 2018.
As a result, Tehran no longer kept its obligations under the agreement and expanded its nuclear program again.
Western countries fear that Iran is developing nuclear weapons.
Iran insists that its nuclear program is for purely civilian purposes.