The Kurdish-led Syrian Democratic Forces said on Sunday that five of its members had been killed during an attack b ISIS militants on a checkpoint in eastern Syria's Deir Ezzor on July 31.
The SDF was the main fighting force allied to the United States in Syria during fighting that defeated ISIS in 2019 after the group captured large swathes of Syria and Iraq.
ISIS has been trying to stage a comeback in the Middle East, the West and Asia. Deir Ezzor city was captured by the group in 2014, but the Syrian army retook it in 2017.