TASS - Work is in progress on the third meeting of the Russian, Turkish, and Iranian leaders on the Syrian settlement scheduled to be held at the beginning of September, Russian Presidential Spokesman Dmitry Peskov told reporters.

"The possibility of holding another trilateral meeting in early September is being explored. After the three presidents� schedules are agreed on through diplomatic channels, we will let you know," Peskov said.

Turkish Presidential Spokesman Ibrahim Kalin earlier said that the third meeting between the Turkish, Russian and Iranian leaders on Syria was scheduled to be held in Tehran in the first week of September.

Russian Presidential Envoy for Syria Alexander Lavrentiev told TASS in late July that the Astana format summit would be held in the Iranian capital in September. He noted that no specific date had been determined.

The meetings between the leaders of Russia, Turkey, France and Germany on Syria are not on Russian President Vladimir Putin�s schedule yet,�Peskov told reporters.

"There is no such a meeting coordinated on the agenda," Peskov said.

It was earlier reported that the summit between Russia, Turkey, Germany and France may take place on September 7 in Istanbul, at Turkish President Recep Tayyip Erdogan�s initiative.

It was also reported that Russian Foreign Minister Sergey Lavrov and Turkish Foreign Minister Mevlut Cavusoglu will discuss the preparations for the summit between Russia, Turkey, Germany and France scheduled to be held on September 7 in Istanbul. One of the main issues of the high-level four-party meeting will be the provision of support for the Syrian refugees.

On November 22, 2017, Russian, Iranian and Turkish Presidents Vladimir Putin, Hassan Rouhani and Recep Tayyip Erdogan held a meeting in Sochi, during which they stressed that significant progress had been made in the joint fight against terrorism in Syria and that a new stage in resolving the crisis in that country had begun. The next step in that process was the Syrian National Dialogue Congress in Sochi on January 30, which brought together more than 1,500 delegates representing all strata of Syrian society. Its participants decided to set up the Constitutional Council and form the Constitutional Commission.

On April 4, the Russian, Turkish and Iranian leaders held a summit on the Syrian settlement in Ankara. The parties adopted a joint statement expressing their determination to continue work on the issue. The next trilateral summit was scheduled to be held in Tehran.