An Israeli plane targeted a position of Assad's regime forces and their militias in the 54th Regiment in the Rashdiyyeh area in Hasaka province, which is controlled mostly by Syria Democratic Forces, the Syrian Observatory for Human Rights reported on Wednesday.
The strike was probably launched by an Israeli aircraft, SOHR further said.
A number of forces and militants, loyal to Syrian President Bashar al-Assad's regime, were killed while others were injured in the strike.