Four U.S. special operations troops were injured earlier this month when a rocket fired by Islamic State jihadists exploded near their position in northern Syria.

According to a senior defense official, all the soldiers have returned to duty after quickly recovering slight injuries.

The U.S. is supporting a predominantly-Kurdish forces to combat ISIS terror group in northern Syria.

The Pentagon claims that all U.S. troops engaged in anti-ISIS operations in Iraq and Syria are on ‘advisory missions not combat ones.