From New York Magazine:
Hours after President Trump announced on Twitter that the U.S. will be attacking Syria, and warned Russia about partnering with Syrian leader Bashar al-Assad, the Kremlin has responded by brushing him off.
“We do not participate in Twitter diplomacy,” Kremlin spokesman Dmitry Peskov told reporters. “We support serious approaches. We continue to believe that it is important not to take steps that could harm an already fragile situation.”