Two more soldiers from the Oklahoma National Guard were killed this week in Afghanistan, bringing the total number killed there since their deployment began to 14.

Dead are Pfc. Sarina Butcher, 19, of Checotah, and Spc. Christopher Gailey, 26, of Ochelata, according to the Department of Defense.

Butcher was the first woman from the Oklahoma National Guard to die in fighting since women were allowed to join the Guard in 1971, according to a release from the Oklahoma National Guard. She was also the youngest Guard soldier to die in combat in Iraq and Afghanistan.

Both died Monday in Paktia province when their vehicle was attacked with an improvised explosive device, according to the Defense Department.