The UN nuclear watchdog on Friday demanded an immediate reply from Iran on whether it would extend a monitoring agreement that expired overnight, prompting an Iranian envoy to respond that Tehran was under no obligation to provide an answer.
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The agreement continued the International Atomic Energy Agency's collection of data on some of Tehran's nuclear activities, cushioning the blow of Iran's decision in February to reduce cooperation with the agency.
"An immediate response from Iran is needed in this regard," the IAEA said in a statement summarizing a report by its chief Rafael Grossi to its 35-nation Board of Governors.
Grossi reached out to Iran last week "to understand Iran's position regarding the possible continued collection, recording and retention of data," the report said. As of Friday, Iran had not indicated if it intended to maintain the arrangement, it said.
Iran's ambassador to the IAEA, Kazem Gharibabadi, said that Iran was "not required to comply" with the IAEA head's request, Iran's semi-official news agency Tasnim reported.
Washington believes Tehran should engage the IAEA without further delay and a failure to do so would contradict Iran's stated desire for both parties to resume compliance with the 2015 Joint Comprehensive Plan of Action nuclear deal as soon as possible, said a US State Department official.
"Iran should engage the IAEA without further delay to ensure appropriate measures remain in place, so the IAEA's continuity of knowledge on JCPOA monitoring can be readily reestablished," the US official said on condition of anonymity.
Iran and the United States have been holding indirect talks on reviving the 2015 nuclear deal between Tehran and major powers that imposed restrictions on Tehran's nuclear activities in exchange for lifting international sanctions.
The Vienna talks, which began in April, are now in a pause that had been expected to last until early July, but failure to extend the monitoring accord could throw those negotiations into disarray.
"Regarding the IAEA, this remains a serious concern," US Secretary of State Antony Blinken, speaking before Grossi updated the board, told a news conference in Paris alongside his French counterpart, Jean-Yves Le Drian. "The concern has been communicated to Iran and needs to be resolved."
Officials on all sides have said there are major issues to resolve before the nuclear deal can be revived.
"We still have significant differences with Iran," Blinken said, adding that he hoped a resumption of talks in the coming days could settle them. "We are just not there yet."
Le Drian echoed that.
"We're waiting for Iranian authorities to take the final difficult decisions to allow for the revival of the 2015 nuclear deal," he said.
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