The U.N. nuclear watchdog's talks with Iran on how to resume inspections at sites including those Israel and the United States bombed cannot go on for months on end, its chief said on Wednesday, pushing for a deal as early as this week.

The International Atomic Energy Agency has had no information from Iran on the status or whereabouts of its stock of highly enriched uranium since Israel launched the first attacks on its enrichment sites on June 13, IAEA chief Rafael Grossi confirmed in an interview.

Tehran has now passed a law suspending cooperation with the IAEA and stipulating any future inspections will need a green light from Iran's Supreme National Security Council. Tehran and the IAEA are now in talks on how inspections can go ahead.