0608 GMT March 19, 2018
However, he added, "These three countries will not make decisions on behalf of the Syrian people, but their efforts will ease the process", Anadolu Agency reported.
The Iranian official said Tehran, Ankara and Moscow “are now one step closer to reaching a common political solution to the issue of peace in Syria”.
Larijani had traveled to Turkey to attend the Asia Parliamentary Assembly (APA) in Istanbul.
Emphasizing that Iran, Turkey and Russia had played a major role in wiping out the Daesh terrorist group, Larijani said: "Some countries that claim they fight Daesh secretly support the organization."
Saying that "certain countries” support terror groups in order to destabilize the region, Larijani added that these countries wasted the energy of Muslim nations.
"Turkey and Iran should warn regional countries about the conspiracies that the US engages in," he added.
On Wednesday, Russian, Turkish and Iranian presidents met at the Russian Black Sea resort of Sochi.
Russian President Vladimir Putin said participants had agreed to support a Syrian “people’s congress” as an initial step toward establishing dialogue between the warring sides.