"It's precisely for discussing this complicated situation that the presidents have agreed to have a meeting in Moscow,” Kremlin spokesman Dmitry Peskov said on August 26.
Hundreds of people, including many civilians, have been killed and tens of thousands of others fled toward the border with Turkey since Syrian government forces and ally Russia in April launched an offensive in Idlib -- the last rebel stronghold in the country.
Ankara has said that the assault was causing a humanitarian crisis and posed a threat to Turkey's national security.
Turkey already has taken in more than 3.6 million refugees from Syria since the conflict began with a government crackdown on protesters in March 2011.
Peskov told journalists Putin understood Erdogan’s concerns but that he was equally concerned about attacks by “terrorist elements” from Idlib that needed to be “stamped out and destroyed.”
Idlib is mainly controlled by Hayat Tahrir al-Sham (HTS), Syria's former Al-Qaeda affiliate.
The region is covered by a de-escalation agreement reached last year between Russia, Iran, and Turkey, which are backing opposing sides in Syria’s civil war.
Russia and Iran have given Syrian President Bashar al-Assad crucial backing throughout the conflict, while Turkey supports different rebel groups.
Peskov said that Putin and Erdogan will also discuss on August 27 the Ukraine crisis as well as relations between Moscow and Ankara.
"Turkey is our close partner, our ally," he said. "We are bound by well-developed multifaceted trade and economic relations and multifaceted ties, which are close even in such sensitive areas as military-technical cooperation."
Ankara has purchased Russia’s S-400 missile-defence system despite strong opposition from Washington, a NATO ally.
Turkey, which has started receiving components of the S-400, says it plans to start using the missile-defence system in April.
