While discussing bilateral relations, the two leaders expressed satisfaction over the growing strategic partnership marked by deepening of cooperation in diverse fields.
A major highway leading to venue of the summit will also be closed.
Hassan Rouhani said that ECO is important forum cooperation for the region and it would be helpful for promoting connectivity for development and prosperity of the region.
Addressing a conference of ECO foreign ministers in Islamabad on Tuesday, Zarif touched on a roadmap developed by member states that lays out ECO's goals and programs in the coming decade, known as the ECO 2025 Perspective Plan or what he called the "vision".
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Pakistan will host the ECO Summit here on Wednesday. China has sent a special representative to attend the ECO summit.
He reveals the 21th century is the era of rising economic power of the east, stressing the need for closer cooperation between the ECO members.
Turkish President Recep Tayyip Erdogan has called for early completion of reforms in ECO, strengthening of human resource of ECO Secretariat and and evolution of a mechanism for ownership of projects. He hoped that the member states would continue to work in harmony for the continued prosperity of the people of the region. Founded in 1985, ECO is made up of Pakistan, Iran, Turkey, Kazakhstan, Kyrgyzstan, Azerbaijan, Tajikistan, Afghanistan, Uzbekistan and Turkmenistan. Being a founding ECO member, Pakistan was committed to the ECO objectives, he said.
Adviser to Pakistan's Prime Minister on National Security and Foreign Affairs, Sartaj Aziz, speaks during an interview with Reuters in Islamabad, Pakistan July 1, 2016. It was a testament to Pakistan's commitment to act as a harbinger of positive changes and meaningful development in the region, the prime minister said. "We will also continue our advocacy policy toward the secretary-general and the ECO Secretariat to accomplish their critical role in initiating, implementing and monitoring activities within the organization", Zarif said.