Russia, Turkey and Iran on Tuesday vowed to continue their cooperation to "eliminate terrorists" in Syria, in a trilateral statement after their presidents met in Tehran.
The three countries "reaffirmed the determination to continue their ongoing cooperation in order to ultimately eliminate terrorist individuals, groups, undertakings and entities," read the statement quoted in an AFP report.
They "expressed their opposition to the illegal seizure and transfer of oil revenues that should belong to Syria".
They also "rejected all attempts to create new realities on the ground under the pretext of combating terrorism, including illegitimate self-rule initiatives, and expressed their determination to stand against separatist agendas" in Syria.
The trilateral statement was released after Erdogan urged his Russian and Iranian counterparts to back his efforts to fight "terrorism" in Syria.
Turkey has launched waves of attacks on Syria since 2016, targeting the Kurdish fighters as well as Islamic State (ISIS) group jihadists.
It has also supported Syrian rebels against the government of President Bashar Al-Assad.
Iran and Russia are also involved in Syria's conflict, but support Assad.
The summit between the three leaders came days US President Joe Biden visited Israel and Saudi Arabia, where he announced two agreements which are widely considered to be significant steps on the path toward normalization between Israel and Saudi Arabia.
One of the deals announced concerns the removal of multinational forces from the Red Sea islands of Sanafir and Tiran, and the other concerns the opening of Saudi airspace for all Israeli flights.
Saudi Arabia and Iran are regional rivals, but they held talks last year with the aim of improving relations, for the first time since cutting ties in 2016.
While no breakthrough has yet been reached, Iran's Foreign Minister said in October they are on the right track.
The two countries are vying for influence in a rivalry that has played out across the region in events such as Yemen's war and in Lebanon.
