The UN nuclear watchdog’s chief Rafael Grossi arrived in Iran on Monday, as he seeks access for inspectors to two suspected former atomic sites after a months-long standoff between Tehran and the body.

Tehran said Grossi’s visit would “strengthen ties and build trust” between Tehran and the International Atomic Energy Agency (IAEA).

However, in a statement on Saturday, Grossi said he would address “the outstanding questions, in particular, the issue of the access”.

Iran’s Foreign Ministry spokesperson Saeed Khatibzadeh said on state TV: “As long as the IAEA moves based on impartiality, independence and distances itself from political pressure of another countries, there will be no problems between the IAEA and Tehran.”

A senior Iranian nuclear official said on Sunday that the IAEA wanted access and inspection of “two places”, one near Tehran and the other near the central city of Isfahan.

Grossi’s visit comes after Washington's last week pushed at the UN Security Council to reimpose international sanctions on Tehran that were lifted under Iran’s 2015 nuclear deal with world powers.

However, Iranian authorities said Grossi’s visit was not related to the US move to return all sanctions on Iran, which other parties to the deal — Russia, China, Britain, France and Germany — have not supported.

In 2018, President Donald Trump pulled the US out of the agreement and reimposed some sanctions that have crippled Tehran’s economy. Iran has retaliated by reducing compliance with the pact’s restrictions.

Khatibzadeh said Grossi would meet high-ranking Iranian officials during his visit, including the foreign minister and the country’s nuclear chief. — Reuters