The Presidents of Pakistan, Afghanistan and Iran Thursday held an informal session, a day aheadof the trilateral summit, aimed at bringing peace and stability andensuring security in the region.

President Asif Ali Zardari, Afghan President Hamid Karzai and Iranian President Mahmoud Ahmadinejad who are here for two-daymeeting held an informal round of talks at the Aiwan-e-Sadr, aspart of the trilateral mechanism.

This is the third round of the trilateral talks that began in2009. Pakistan believes that the summit would prove to be animportant milestone towards finding peace, stability and Afghan-ledreconciliation process.

The Foreign Office earlier said the trilateral mechanism wasimportant for Pakistan as it would discuss matters pertaining tocooperation in counter-terrorism, curbing transnational organizedcrime, including drug and human trafficking, and border management.

The formal trilateral summit would be held on Friday. Thethree leaders will address a press conference at the end of talks.