Russia has repeated its warning to the West against any unilateral action on Syria.
Speaking in Moscow after meeting top Chinese diplomats, Foreign Minister Sergei Lavrov said all parties need to strictly adhere to the norms of international law.
His comments come a day after Barack Obama, in some of his strongest language yet, said US forces could move against Syria if it starts using chemical weapons against insurgents.
The US president told an impromptu White House press conference: “This is an issue that doesn’t just concern Syria; it concerns our close allies in the region, including Israel. We have been very clear to the Assad regime, but also to other players on the ground, that a red line for us is we start seeing a whole bunch of chemical weapons moving around or being utilised.”
Last month, Syria admitted for the first time that it had chemical and biological weapons and threatened to use them if foreign countries intervene.