TEHRAN (Sputnik) — The attack contradicts international law, jeopardizes the new Syrian ceasefire and helps terrorist groups, Qasemi added.
"This action, which coincided with a Daesh's offensive, indicates that the United States is supporting terrorist groups in Syria and is also a violation of Syria's sovereignty," Bahram Qasemi said in a statement obtained by Sputnik.
The attacks by the coalition planes near the Deir ez-Zor airport were first reported by the Syrian army on Saturday. Later in the day, the Russian Defense Ministry confirmed the attacks saying they killed 62 servicemen and injured 100 more. The US Central Command later said that Syrian troops were mistaken for Daesh terrorist group.
The US-led coalition has been carrying out anti-Daesh strikes since September 2014 without Syrian government consent.