The service member killed was reportedly an Army Green Beret, NPR reports.
The U.S.-led coalition announced that the personnel were targeted by an improvised explosive device in an undisclosed location.
News of the casualties came with an announcement that OIR forces conducted 21 separate military strikes against ISIS forces in Iraq and Syria between March 23 and March 29 as part of the coalitions ongoing efforts to "degrade, disrupt and dismantle" the terror network.
There are currently 2,000 U.S. troops fighting ISIS in Syria as part of OIR. But put speaking before supporters at a rally in Ohio on March 29, President Donald Trump said that U.S. forces "will be coming out of Syria, like, very soon."
"We’re knocking the hell out of ISIS. We’ll be coming out of Syria, like, very soon," the commander-in-chief said. "Let the other people take care of it now. We got to get back to our country where we belong, where we want to be."
This is a breaking news story and will be updated with new information as it becomes available.