Turkish Foreign Minister Mevlüt Çavuşoğlu holds phone call with his U.S. counterpart Rex Tillerson over Syrian National Dialogue Summit in Sochi and Turkey's ongoing anti-terror operation in Afrin, Turkish diplomatic source said Wednesday.

The top diplomats also exchanged views on Iraq during the phone conversation.

The phone call came a day after the Syrian National Dialogue Congress was held in the Russian Black Sea city of Sochi on Jan. 29-30.

The Syrian National Dialogue Congress, backed by Turkey, Russia and Iran, aims to bring all the warring parties in the Syrian conflict, excluding terror groups, to the table to facilitate the U.N.-sponsored peace talks in Geneva.

Parties at the two-day congress also said in a final statement that they wanted to bring an end to the ongoing conflict in the region as soon as possible, and urged for international help towards this end.

Turkey launched "Operation Olive Branch" on Saturday at 5 p.m.(02:00 p.m. GMT) in Syria's northwestern Afrin region; the aim of the operation is to establish security and stability along Turkish borders and the region as well as to eliminate PKK-linked and Daesh terror groups, and protect the Syrian people from the oppression and cruelty of terrorists.

The operation is being carried out under the framework of Turkey's rights based on international law, U.N. Security Council resolutions, its self-defense rights under the U.N. charter, and respect for Syria's territorial integrity, it said.

The military also said the "utmost importance" is being put on avoiding any harm to civilians.