The International Atomic Energy Agency on Thursday demanded that Iran fully co-operate with the agency and provide "precise information" about its stockpile of near weapons-grade uranium, as well as grant its inspectors access to Iranian nuclear sites.
A report by the official IRNA news agency on Friday quoted foreign ministry spokesman Esmail Baghaei as saying that Iran informed the Vienna-based IAEA in a letter that as well as ending an agreement forged over the summer in Cairo, the Iranian government could take "other actions" in response to Thursday's resolution.
Iran suspended all co-operation with the IAEA after the war with Israel.
IAEA Director-General Rafael Mariano Grossi then reached an agreement with Iranian Foreign Minister Abbas Araghchi in Cairo in early September to resume inspections.
Baghaei did not immediately elaborate on what further actions Iran would take, but further uranium enrichment by the country is a possibility.
He accused the IAEA of amplifying "grudges" held against Iran by the United States, the United Kingdom, France and Germany.
The minister complained the resolution did not mention the reason that Iran halted inspections was because of the strikes by Israel and the US against Iran's nuclear facilities in June.
The IAEA's resolution sets the stage for a likely further escalation of tensions between the UN nuclear agency and Iran, which has reacted strongly to similar moves by the watchdog in the past.
After a 12-day air war in June with Israel, Iran suspended all cooperation with the IAEA.
Strikes on Iran killed nearly 1100 in Iran, including military commanders and nuclear scientists.
After the deal to resume inspections in September, the UN reimposed crushing sanctions on Iran later that month through the so-called snapback mechanism contained in the 2015 Iran nuclear deal, drawing an angry response from Tehran and leading it to halt implementation of the Cairo agreement.
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