The US Central Command (CENTCOM) has denied claims made by Isis it had shot down one of its warplanes.
The terror group's Amaq news agency claimed Isis shot down a US A-10 Thunderbolt "Warthog" in Syria.
The agency said "there is no informaiton about the fate of the pilot" and claimed jets were bombing the wreckage near Markadah, south of Hasakah.
"At this time there is no reporting of downed coalition aircraft of any kind," a spokesman for CENTCOM told The Independent.
The US-led coalition have been providing air support for anti-Isis forces in Iraq and Syria since 2014.
Isis have previously shot down a Russian military helicopter in Idlib province, killing three crew and two officers.
It was the deadliest single incident for the Russian military since it entered Syria's civil war.
In July, two Russian airmen were killed in the central Homs province when their Mi-25 helicopter was shot down by what the defence ministry said were Isis fighters.
Isis also claimed to have shot down a Syrian military jet near Damascus and another Syrian Air Force plane near the city of Deir Ezzor.
It was one of several attacks on Syrian jets claimed by Isis, including an attack in July where they later hung a pilot's corpse on display in the streets.
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