Tehran suspended IAEA inspections in February. Since then, some of the global watchdog's monitoring equipment at key sites, such as centrifuge workshops, is no longer operational.
Protests in front of the homes of Hizbullah MPs have become prevalent lately, as discontent with the party is growing among its Shia base of support.
Lebanese Hizbullah has provided support to the Houthis since the movement emerged in the 1990s, and its operatives need to be held accountable, officials say.
The summit Saturday brought together leaders from France, Jordan, Egypt, Qatar, the United Arab Emirates, Kuwait, Turkey, Iraq, Iran and Saudi Arabia.
Middle Eastern support for Kabul evacuations is emblematic of 'strong and enduring' partnerships in the region, the US secretary of state says.
The assassination of Hizbullah critic Lokman Slim solidified the conviction that Lebanon is occupied by Iran and that opponents will be silenced.
The disruptive actions of Iran's IRGC represent a major obstacle to the economic and military plans of Russia and China in the Middle East.
International concerns over Lebanon have grown since last year as the country is on the point of implosion. Many blame Hizbullah for the impasse Lebanon has reached.
Eight individuals selected to head various ministries are current or former commanders of the military or the IRGC.
Hizbullah has been attempting to conceal the facts about last year's cataclysmic explosion at the Beirut port, but hopes remain that the true culprits will be found and prosecuted.