Iran has indicated that an offer that could give United Nations inspectors “full supervision” of Iranian nuclear activities does not include allowing inspections on short notice.

Iranian nuclear chief Fereydoun Abbasi-Davani says Tehran has fully cooperated with the U.N.'s nuclear watchdog agency and will not accept any more “obligations.” His comments were reported Tuesday by the state-affiliated ISNA news agency.

On Monday, ISNA quoted Abbasi-Davani as saying Iran would be willing to give International Atomic Energy Agency inspectors “full supervision” of nuclear activities for five years if sanctions against the country were lifted. He did not explain what he meant by “full supervision.”

However, in his Tuesday remarks, he said Iranian cooperation did not include the implementation of “additional protocol.”

The IAEA has been trying to gain unfettered access to Iranian nuclear sites for years and has long complained of a lack of Iranian cooperation with inspectors.

An IAEA report released to the media Friday said information obtained from member states has made the agency “increasingly concerned” that Iran secretly is developing a nuclear payload for a missile.

Abbasi-Davani rejected the accusation as “fabricated and baseless.” Iran says its nuclear program is devoted only to the peaceful generation of energy.

In a separate development, Iran announced Tuesday that it had begun a 10-day military exercise.

State news reports say the air force drill will include evaluations of its hardware, tactics, and ammunition.