United Nations nuclear inspectors arrived in Tehran Monday, hoping to hold talks with key officials and scientists on Iran's controversial nuclear program during their two-day visit.
The visit marks the second in less than a month by the International Atomic Energy Agency team. So far, Iranian officials continue to deny allegations of a nuclear weapons program and have refused to discuss it.
The inspectors hoped to meet with Iranian nuclear scientists and visit the Parchin complex, a military base and conventional weapons development facility outside of Tehran. Some experts suspect the site houses a secret underground nuclear facility.
The IAEA visit comes less than a week after Iran announced advancements in its nuclear program.
The United States and Israel believe the Islamic Republic is trying to develop nuclear weapons and tensions with the West continue to grow.
Meanwhile, Iran's elite Revolutionary Guard is staging a two-day military exercise to upgrade its defense capabilities in case of an attack.
In recent weeks, Iran's navy has held exercises in the Strait of Hormuz in the Persian Gulf and threatened to shut down global oil exports that pass through that waterway.
Over the weekend, Iran cut off crude oil exports to Britain and France in an apparent preemptive blow in retaliation for the European Union's latest sanctions against its nuclear program.