Iran is ringing two deeply buried tunnel complexes with a massive security perimeter linked to its main nuclear facility, a report said Wednesday, amid U.S. and Israeli threats of attack. The Institute for Science and International Security released its report based on recent satellite imagery as the U.

China supports Iran holding talks on its nuclear program with the United States and opposes the use of force and "illegal" unilateral sanctions to try to resolve the issue, Chinese Foreign Minister Wang Yi told Iran's foreign minister on Wednesday.

A second round of nuclear talks between the United States and Iran concluded on Saturday, with both sides indicating progress. Delegations from both countries met in Rome for negotiations following an initial round in Oman last weekend.