Russia on Friday slammed the U.S. decision to launch airstrikes against a Syrian air base in retaliation for a chemical weapons attack by the Syrian government, calling the military action a “clear act of aggression” that would “further undermine Russo-American relations.” The harsh words came from Russia’s foreign ministry, which lambasted President Trump’s decision to send in 59 tomahawk missiles against a Syrian government air base the U.S. says was the origin of Tuesday’s chemical weapons attack by forces of Syrian President Bashar al-Assad, which left scores dead in Idlib.

“The presence itself of military personnel from the U.S. and other countries on the territory of Syria without the permission of the government of that country or a resolution of the U.N. Security Council is a gross, clear and in now way justified violation of international law,” the Russian foreign ministry said. “If before it was explained as a mission in the battle against terrorism, now it is a clear act of aggression against a sovereign Syria. The taking of these actions by the U.S. today yet further undermines Russo-American relations.” MORE