By Shadi Khan Saif

KABUL, Afghanistan

A U.S. soldier was killed and another wounded in Afghanistan following an apparent insider attack, an official statement confirmed on Monday.

The NATO-led Resolute Support Mission in Afghanistan said the two U.S. servicemen were shot at in eastern Afghanistan leaving one killed and another wounded, but stable.

''The sacrifice of our service member, who volunteered for a mission to Afghanistan to protect his country, is a tragic loss for all who knew and all who will now never know him," said Gen. Scott Miller, the newly appointed top commander of the Resolute Support Mission and the U.S. forces in Afghanistan.

No more details were shared about the incident.

Gen. Miller took over from Gen. John Nicholson, who led the NATO mission for over two years, on Sunday in a change of command ceremony held in the capital Kabul.

Insider attacks are usually referred to friendly forces, in this case, Afghan forces, turning their guns on U.S. trainers.