A suicide bomber detonated himself in a convoy of U.S. forces in Syria's northeastern province of Hasakah on Monday, injuring two U.S. soldiers and killing five Kurdish-led fighters, a war monitor reported.

The bomber detonated his car bomb while a convoy of U.S. forces accompanied by Kurdish-led fighters of the Syrian Democratic Forces (SDF) in the southern countryside of Hasakah, said the Syrian Observatory for Human Rights.

The UK-based watchdog group said the attack happened near the city of Shadadi on the road between Hasakah and the northern province of Raqqa.