The International Atomic Energy Agency, the United Nations nuclear watchdog, has inspected an Iranian facility that Israeli Prime Minister Benjamin Netanyahu labeled a “secret atomic warehouse” in Tehran, reported Reuters, citing “three diplomats familiar with the agency’s work.”

Netanyahu, in a speech at the United Nations in September, called on the IAEA to examine the site, claiming that it housed 33 pounds of “unspecified radioactive material that had since been removed,” according to Reuters.

The prime minister said that the warehouse exemplified that Iran seeks to create a nuclear bomb, despite the 2015 agreement that sought to slow down the nuclear program in exchange for sanctions relief.

One of the diplomats said the IAEA was at the location more than once last month.

The IAEA declined to comment to Reuters.

An Iranian official told the outlet, “We have nothing to hide and any access given to the IAEA so far has been in the framework of laws and regulations and nothing beyond that.”