DAMASCUS: Syria expressed outrage on Monday after a suspected US-led coalition strike for the first time killed regime troops, but the coalition denied its warplanes hit an army base. In a letter to the United Nations Security Council and Secretary General Ban Ki-moon, Syria’s foreign ministry condemned what it called a “flagrant aggression” that killed at least three soldiers late on Sunday. But a spokesman for the US-led coalition said its only strikes in the area on Sunday were some 55 km southeast of the Syrian army base. “The Syrian Arab Republic strongly condemns this flagrant aggression by the US-led coalition forces, which blatantly violates the objectives of the UN charter,” the foreign ministry said in the letter. “The Syrian foreign ministry demands the UN Security Council act immediately in the face of this aggression and take appropriate measures to prevent its recurrence,” the letter added.