Iran has agreed to allow the International Atomic Energy Agency to service surveillance cameras at the country's nuclear facilities.
The agreement was announced on Sunday in a joint statement following a meeting between IAEA head Rafael Grossi and Mohammad Eslami, the head of Iran's Atomic Energy Organization in Tehran.
It is Grossi's first visit to Iran since the government led by new President Ebrahim Raisi, an anti-US hardline conservative, was formed in August.
Iran agreed with the UN nuclear watchdog in February to preserve the surveillance footage. But an IAEA report, released earlier this month, says that it has no access to the monitoring equipment.
The joint statement says IAEA inspectors will be permitted to service the equipment and replace their storage devices.
It also notes that the storage media will be kept in Iran under the joint seals of the IAEA and Iran's nuclear agency.
Iran has been stepping up its nuclear activities after former US President Donald Trump pulled his country out of the 2015 nuclear deal, and re-imposed sanctions against Tehran in 2018.
The steps include enriching uranium to 60 percent purity, a level far beyond limits set under the deal.
The agreement on Sunday came ahead of the IAEA's regular meeting of governors, which will begin on Monday.
Iran may have taken a cooperative stance in a bid to ease criticism and concern from Western nations.