Russian Foreign Minister Sergei Lavrov on Sunday warned against what he called unfounded claims that Syria has chemical
weapons, as the United Nations Security Council investigates deadly chlorine gas attacks.
His comments came after Russia on Friday backed the setting up of a UN Security Council panel to identify who is behind the chlorine attacks, which the West blames on the Damascus regime.
Lavrov said the operation to remove chemical weapons from Syria was successful, and that all claims to the contrary should be checked.
"This problem was successfully resolved," he said of Syria's chemical weapons stocks in a statement.
Syria in 2013 had agreed to turn over its chemical arsenal and disable production sites after the United States threatened military action over a sarin attack outside Damascus.
A total of 1,300 metric tons of chemical weapons have been removed from Syria, with the majority being destroyed aboard the US Navy ship MV Cape Ray.
"Sometimes publications come out that there could be undeclared chemical weapons in Syria. This is all being checked, here we must avoid unfounded accusations," Lavrov said Sunday.
"We have every basis to consider that Syria will continue cooperating closely."
There were several reports of chlorine gas attacks in Syria in the past year, and the Organization for the Prohibition of Chemical Weapons (OPCW) later released a report in which it concluded "with a high degree of confidence" that chlorine gas had been used in attacks on three villages in Syria last year.
The United States, Britain and France have repeatedly accused President Bashar Al-Assad's forces of carrying out chlorine gas attacks with barrel bombs dropped from helicopters, and U.S. Secretary of State John Kerry has warned Assad he would be held to account for using chlorine gas against civilians.
Russia maintains there is no solid proof that Damascus is behind the attacks.
Russia's top diplomat reiterated Russia's backing for embattled Assad, arguing that the US-led coalition should overcome its "persistent rejection" of cooperation with the Assad regime in the fight with the Islamic State (ISIS) group.
"We still think this objective is achievable," he said.
Lavrov on Tuesday is set to meet his Saudi counterpart Adel al-Jubeir in Moscow to discuss the situation in Syria and Yemen and ways to combat ISIS.
Lavrov stressed that international powers should unite against ISIS, calling it a "common enemy."
He referred to a map drawn up by ISIS showing its plan to control the sites of Mecca and Medina in Saudi Arabia which are sacred to Muslims.
"Members of this terrorist organization have promised to blow up Muslim sacred sites because they consider them to be a reflection of 'incorrect' Islam. This is a terrible organization," he said.
AFP contributed to this report.