The leaders of Iran, Afghanistan and Pakistan have agreed at a summit in Tehran to open their future meetings to other parties, possibly including the United States.
Iranian President Mahmoud Ahmadinejad, Afghan President Hamid Karzai and Pakistani President Asif Ali Zardari met on Sunday to discuss regional security issues.
Mr. Karzai asked his counterparts to allow other nations to participate in future summits, a request to which they agreed. Afghanistan is trying to fight a resurgent Taliban insurgency and widespread narcotics production with help from U.S.-led NATO troops.
The United States is seeking support from all of Afghanistan's neighbors to stabilize the country, including Iran. Washington has not had formal relations with Tehran for almost three decades.
Mr. Ahmadinejad used the summit to criticize the presence of foreign troops in the region, saying they have not contributed much to regional security.