It gave no further details but Putin said last month he would convene such a gathering to discuss the situation in Syria, where Russia and Turkey have been trying to create a de-escalation zone.

The three countries say they want a political settlement to end the Syrian conflict. But while Russia and Iran back Syrian President Bashar al-Assad, Turkey - along with its NATO allies including the United States - wants him to step down, according to euronews.

Russia, Turkey and Iran are the guarantors of truce in Syria.

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