NUR-SULTAN, August 2. /TASS/. The trilateral Russia-Iran-Turkey summit on Syria is scheduled for September this year, senior aide on political issues to the Iranian foreign minister Ali Asghar Haji said at a press conference on Friday.

"The next month, the specific date has not been determined yet, we will hold a summit to discuss the latest developments and our achievements," he said.

Later, answering a TASS question, he specified that he believes it will take place "in the second half of September."

The 13th international high-level meeting on Syria was held in Nur-Sultan on August 1-2. The guarantors, the Syrian government and the armed opposition sent their delegations to Kazakhstan. The United Nations and Jordan were invited to the talks as observers, as well as Iraq and Lebanon, who took part in the Astana peace process for the first time.