Afghanistan, June 9 -- IAEA chief warns Iran's cleanup of undeclared uranium sites obstructs inspections, raising doubts about the peaceful nature of its nuclear program.

The head of the United Nations nuclear watchdog, Rafael Grossi, has accused Iran of attempting to clean up undeclared sites containing traces of uranium. Grossi warned that these actions hinder the International Atomic Energy Agency's (IAEA) verification efforts and increase doubts about Iran's past nuclear activities.

In his opening remarks at the IAEA Board of Governors meeting in Vienna, Grossi stated that Iran has repeatedly failed to provide satisfactory answers or has given technically inadequate responses to the agency's questions. He emphasized that Iran's attemp...