Airstrikes on Monday targeted people who the military said were senior leaders of the group, which has sharply stepped up its attacks in Iraq and Syria.

The attacks came on the heels of a number of joint operations with Iraqi forces that targeted IS militants in Iraq

Oct. 31 (UPI) -- American warplanes attacked Islamic State camps in Syria this week, killing as many as 35 militants, the U.S. military said, amid an apparent increase in strikes targeting the terrorist organization.