"The meeting will mainly be on Idlib and other parts of Syria, on the general security situation, transition processes, constitutional commission and re-settlement," Kalin said, Anadolu Agency reported.

After a Cabinet meeting in capital Ankara, Kalin also said there would be another meeting with Russian, German and French leaders in two months.

"A quadruple summit is planned before going to the UN General Assembly," he said.

Kalin underlined that Syria and regional issues will be discussed in these meetings.

About the Russian S-400 defense systems, Kalin said they would be delivered to Turkey very soon.

"This is not a defense system that would pose a threat or danger to our current security system, especially within the NATO system," he said.

"First of all, it is a defense system, not an attack system against another country, therefore it is not a threat to another country," he added.

Kalin went on to add that the National Defense Ministry and the Air Force Command will be deciding upon where the air missiles will be deployed.

Reporter’s code: 50101