TEHRAN, Iran (AP) — Iran's supreme leader has said he will not allow international inspection of Iran's military sites or access to Iranian scientists under any nuclear agreement with world powers.

Ayatollah Ali Khamenei told military commanders Wednesday that Iran will resist "coercion and excessive demands."

Khamenei made the remarks as negotiators from Iran and six world powers launched a new round of talks focused on reaching a final deal that curbs Iran's nuclear program.

Negotiators reached a framework agreement in March and hope to strike a final deal by June 30.

A fact sheet on the framework accord issued by the U.S. State Department has said Iran would be required to grant the U.N. nuclear agency access to any "suspicious sites."