Leaders of Iran, Russia and Turkey are due to meet in Tehran on September 7, with Syria high on their agenda.
Of the three countries due to meet in Tehran, Turkey is the only one hosting large numbers of Syrian refugees.
Aljazeera: Turkey, Russia, Iran leaders meet in Tehran over Idlib
(LtoR) Iran's President Hassan Rouhani, Turkey's President Recep Tayyip Erdogan and Russia's President Vladimir Putin shake hands after a joint press conference as part of a tripartite summit on Syria, in Ankara, on April 4, 2018. The presidents of Iran, Turkey and Russia met on April 4, 2018 for their second tripartite summit in under six months, aiming to speed the peace process for Syria and bolster their influence in the country. / AFP PHOTO / ADEM ALTAN
