A US stream has shot down an Iranian-made automaton worked by powers backing the Syrian government in the south of the nation, American authorities say.
The automaton was believed to be equipped and debilitating US troops on the ground, authorities said.
It was shot down close Tanf, a station of the US-drove coalition.
This is the most recent occurrence in the skies over Syria, after the US shot down a Syrian military aircraft on Sunday and another automaton prior this month.
The F-15 plane brought down the automaton around 00:30 on Tuesday (21:30 GMT Monday) north-east of Tanf, as per a US military articulation.
The shooting down underscores the growing pressures in the district as a fight creates for the control of eastern Syria, BBC Defense and Diplomatic Correspondent Jonathan Marcus says.
Trump and the fight for eastern Syria
Military authorities who addressed CNN depicted it as a Shahed 129, a model uncovered by Iran in 2012.
It is said by the Iranians to have a scope of 2,000km (1,240 miles) and be fit for conveying bombs and rockets.
"They were undermining our powers on the ground," the US official cited by AFP said. "Their course was on a keep running toward our people to drop an ammo on them."
The last automaton the US says it shot down was likewise allegedly wrecked close Tanf in the wake of shooting on coalition strengths.
Tanf has been utilized by Western unique powers and Syrian revolt strengths.
How risky is the circumstance in the district?
In Syria's mind boggling common war, the US backs some revolt bunches contradicted to President Assad, and additionally contenders looking to drive out the Islamic State (IS) gathering.
Syrian government powers and genius government civilian armies, upheld by Russia and Iran, are battling both revolt gatherings and IS.
A month ago, US-drove coalition air ship shelled a caravan of genius Syrian government constrains close Tanf.
The Syrian plane obliterated on Sunday, a Su-22 warrior aircraft, was hit after apparently dropping bombs close to the town of Tabqa in Raqqa area.
And also reporting that US-drove coalition warplanes would be followed, Russia's service of guard suspended a hotline set up to stay away from conflicts amongst US and Russian flying machine over Syria.
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