The International Atomic Energy Agency (IAEA) has confirmed it has been allowed access to the Parchin nuclear site, which Iran is accused of using to develop nuclear weapons.

The IAEA reportedly received samples from the site for analysis, taken by Iranian nuclear experts under IAEA oversight.

Access to the Parchin site is a key element of the joint comprehensive plan of action (JCPA) agreed between Iran, the US and other world powers in July 2015. Previously the IAEA only had access to satellite images.

“Significant progress has been achieved in the implementation of the road-map,” Yukiya Amano, director general of the IAEA told the media. ““Much work remains in the weeks ahead. Full implementation of the road-map is essential to clarify all outstanding past and present issues regarding Iran’s nuclear programme.”

The road-map sets out a timeline for implementation of the commitments in the JCPA.

Amano also held talks with President Hassan Rouhani, Vice-President of Iran and President of the Atomic Energy Organisation of Iran, Ali Akbar Salehi, and Foreign Minister Mohammad Javad Zarif over the implementation of the agreement.