Story highlights This is the first time pro-Syrian regime forces have fired on the US-led coalition

The "munition did not have an effect on coalition forces," according to a spokesman

Washington (CNN) US aircraft shot down an Iranian-made drone that fired on coalition forces patrolling with partner forces in southern Syria, a coalition spokesman told reporters on Thursday. But U.S. Army Colonel Ryan Dillon, a spokesman for the U.S.-led coalition fighting Islamic State, told reporters the drone meant to attack them and dismissed the possibility it had fired a warning shot. “Despite previous warnings, pro-regime forces entered the agreed-upon de-confliction zone with a tank, artillery, anti-aircraft weapons, armed technical vehicles and more than 60 soldiers posing a threat to the Coalition and partner forces based at the At Tanf Garrison. Damascus - A military alliance fighting in support of President Bashar al-Assad said on Wednesday it could hit US positions in Syria, warning that its “self-restraint” over US air strikes on government forces would end if Washington crossed “red lines”.
Shortly after bombing Syrian government and allied troops near Al-Tanf, the United States shot down an Iranian-made Syrian government drone that was flying toward U.S.-led coalition forces in southern Syria. There are no injuries or damage. An American official says this is first time forces supporting Damascus have attacked coalition troops.