VIENNA — Iran has agreed to give the U.N. nuclear agency information and explanations about so-called exploding bridge wire detonators, the IAEA said on Sunday, as part of its investigation into suspicions Tehran may have carried out atomic bomb research.

The International Atomic Energy Agency (IAEA) said in a statement that seven steps that Iran had agreed to implement by May 15 also included inspector access to the Saghand uranium mine.

The agency suspects that Iran worked secretly on nuclear arms, something Tehran denies. Their investigation has been stalled for more than six years.

But the IAEA hopes to make progress under an agreement signed with Tehran in November that foresees a step-by-step approach to unresolved questions, starting with less sensitive issues and progressing to the arms-related queries.

The talks are separate from negotiations between Iran and six world powers on Tehran's known nuclear programs.