A US F-16 jet shot down Monday an Iranian-made Shahed 129 drone flying in southern Syria near the Al-Tanf Syrian-Iraqi crossing which is held by US special forces and Syrian allies, a US official confirmed. The drone was armed and posed a threat to the US forces stationed at the crossing. This was the second time the US had shot down an Iranian drone in less than a month. On June 8, an American fighter jet downed a drone flown by Iranian-supported Hizballah forces for an attack on US-backed troops. Monday's incident also marked the fifth time since late May that the US military has bombed pro-Syrian forces in southern Syria. Sunday, US fighter-bombers shot down a Syrian warplane.