Iranian Deputy Foreign Minister for Arab-African Affairs met United Nations Special Envoy for Syria Staffan de Mistura in the Iranian capital on Monday and the two discussed recent developments in Syria.

Hossein Jaberi Ansari and de Mistura, during their talks examined Syria developments, including defeats suffered by the Daesh Takfiri terrorist group, implementation of peace agreement and establishment of truce in the war-torn country, IRNA reported.

Staffan de Mistura arrived in the Iranian capital on Sunday evening.

De Mistura's visit to Tehran is taking place on the eve of the sixth round of Astana talks on Syria to be held in the upcoming days in the capital of Kazakhstan.

Senior UN envoy is also to meet and hold talks with the Iranian Foreign Minister Mohammad-Javad Zarif.

Since March 2011, Syria has been suffering from unrest and terrorist acts.

Iran, Russia and Turkey are the initiators of the December 30, 2016 ceasefire in Syria.

The three countries have so far held five rounds of Astana talks.