The death toll for deadly roadside bomb blast in Afghanistan rises to 4 US troops

US Army

Pfc. Poff, a 3rd Cavalry Regiment soldier assigned to the Train, Advise, Assist Command - East advisory team security force, keeps watch from behind a position of cover in a rural area adjacent to the the Nangarhar police Regional Logistics Center during an advising trip Jan. 6, 2015. US Army

• A US soldier wounded by an improvised explosive device that killed three other US service members has died of his injuries, according to the Department of Defense.
• Army Sgt. Jason Mitchell McClary was the youngest of the four deceased US troops. He was 24.
• 14 US service members have lost their lives in Afghanistan this year.

A US soldier critically injured by a roadside bomb that killed three US service members in Afghanistan last week died of his wounds over the weekend.

Army Sgt. Jason Mitchell McClary, a 24-year-old native of Export, Pennsylvania, died Sunday in Landstuhl, Germany from injuries sustained from the improvised explosive device in Andar, Ghazni, Afghanistan on Nov. 27, the Department of Defense said in a statement Monday.

McClary was assigned to 1st Battalion, 38th Infantry Regiment, 1st Stryker Brigade Combat Team, 4th Infantry Division, Fort Carson, Colorado. That blast also killed three special operations troops - Army Capt. Andrew Patrick Ross, Army Sgt. 1st Class Eric Michael Emond, and Air Force Staff Sgt. Dylan J. Elchin.

Read More: A roadside bomb in Afghanistan killed 3 US special operations troops

Two other US service members were injured in the incident, as was an American civilian contractor.

Five US service members were killed in Afghanistan in November, making it the deadliest month for US forces fighting in country this year. The death of Sgt. McClary brings the total death toll for American service members in Afghanistan so far this year to 14.

Over the past three years, the Afghan security forces have lost over 28,000 troops and police officers, the Afghan president said last month. During that time, government control of Afghanistan has dropped from 72 percent in 2015 to just over half.

Read More: The war in Afghanistan looks bleak as the government loses more control and Afghan security force casualties rise

The Taliban "are not losing right now," Gen. Joseph Dunford, chairman of the Joint Chiefs of Staff, said recently. "We used the term stalemate a year ago and, relatively speaking, it has not changed much."