数百名伊斯兰国战斗人员在空袭中丧生

Airstrikes have killed at least 250 Islamic State fighters in Iraq, both Iraqi and U.S. officials reported Thursday.

The airstrikes hit around 40 Islamic State vehicles just south of Fallujah, a former Islamic State stronghold liberated by U.S.-led Iraqi coalitions last week.

These airstrikes mark the deadliest attack against the jihadist group, though officials warn their morale does not seem to be damaged, despite territorial losses.

Syrian forces have also made strides this week in regaining control of Islamic State held towns near Iraq which have effectively erased the border for jihadist fighters, making transportation and coordination easier in what Islamic State has declared its "caliphate" of the two countries.

After succeeding in their month-long coalition to seize control of Fallujah, Iraqi forces will work to retake Mosul, Iraq's second-largest city, from jihadist control.