Killer Bashar al-Assad met late Tuesday his Russian counterpart Vladimir Putin in Moscow, a Kremlin source said Wednesday.

"The Syrian President al-Assad visited Moscow yesterday night and met President Putin," Kremlin spokesman Dmitry Peskov told reporters, adding that the meeting had lasted "long enough".

Peskov said the two leaders discussed Russian airstrikes in Syria, the regime's operations and their counterterrorism cooperation.

He declined to comment on whether they discussed Assad's future in a potential resolution to the Syrian civil war.

Anadolu Agency