A U.S. service member died Tuesday in eastern Afghanistan in what officials say was a non-combat death, according to a NATO news release.

The death marks the second for American troops in Afghanistan this week. A U.S. service member was killed Monday and a second injured in an apparent insider attack carried out Afghan security personnel, or someone wearing their uniform.

The name of the service member who died Tuesday was not released pending, notification of next of kin.

The incident is currently under investigation, according to the news release. No additional information was immediately made available.

Army Gen. Scott Miller assumed command of U.S. forces operating in Afghanistan on Monday. Miller replaced Army Gen. John Nicholson, who served more than two years in that role.

--Gina Harkins can be reached at gina.harkins@military.com. Follow her on Twitter at @ginaaharkins.