Iranian President Hassan Rouhani, right, welcomes United Nations nuclear…

The Parchin compromise comes less than a month before an October 15 deadline for the IAEA to gather information on allegations that Iran tried to build atomic weapons and after more than a decade of essentially stalemated agency attempts to follow up the allegations.

The “environmental sampling from some specific parts within the Parchin complex” was conducted in the past week, Iran’s Atomic Energy Organisation spokesman Behrouz Kamalvandi told state media.

Under an agreement sealed in July between six world powers and Iran aimed at ending a 13-year standoff, Tehran must curb its nuclear activities to make any dash to produce a weapon all but impossible.

Under an agreement between Iran and the agency in July, it was agreed that Mr. Amano would be able to visit Parchin.

In a 61-43 vote on Thursday, the worldwide Atomic Energy Agency’s (IAEA) General Conference rejected a resolution proposed by several Arab states that called for global supervision and inspections of Israel’s nuclear sites.

Under the new deal inspectors from the IAEA will continuously monitor Iran’s declared nuclear sites and verify that no fissile material is moved covertly to a secret location for a bomb. Iran denies the charge saying its nuclear activities have peaceful purposes like power generation and cancer treatment. It wasn’t immediately clear if IAEA experts were present during the sampling. The agency has frequently said that subsequent renovation work at and near the building could hamper the IAEA probe, a position Amano repeated on Monday.

Amano said the agency expects to wrap up remaining issues with Iran “by the end of the current year”.

Iran’s supreme leader, Ayatollah Ali Khamenei, who has the final say on all major policies, has said it’s up to lawmakers to approve or reject the deal.