Russia warned Friday the United States against any unilateral military strike on Syrian chemical facilities.

"We are especially alarmed by the fact that military infrastructure facilities guaranteeing the safety and security of arsenals of Syrian chemical weapons are considered among the possible targets of strikes," the Foreign Ministry said in a statement.

Moscow warned Washington and its allies against "delivering any strikes at chemical or adjacent territories," it said.

Kremlin Spokesman Dmitry Peskov said Thursday that Russia could not take the U.S. proof of chemical weapons use in Syria as they were far from convincing.

At a press conference in St. Petersburg on the sidelines of a G20 summit, Peskov said the UN Security Council was the "only legitimate body" in international affairs that can use legitimate forces.

President Vladimir Putin suggested world leaders discuss the situation in and around Syria during a Thursday dinner, so that "we do not heap up things together."