French jihadist David Drugeon was likely killed in a coalition strike in Syria in July, a US official said Friday.

Drugeon, an alleged bombmaker, has been described as a key figure in the Al-Qaeda offshoot Khorasan group. US officials previously thought he was killed in a November 2014 drone strike but the claim was later disproved.

"There are very good chances that we did get him in a strike in July in Syria," the US official told AFP.