A female soldier and a fellow Oklahoma National Guard member have been killed in combat in Afghanistan.

The Department of Defense announced Wednesday that 19-year-old Pfc. Sarina Butcher of Checotah and 26-year-old Spc. Christopher Gailey of Ochelata died Tuesday when their vehicle was attacked with an improvised explosive device in Paktia province.

The Oklahoma National Guard says Butcher is the first female Oklahoma National Guard soldier to be killed during wartime and also is the youngest Guard member to die in combat in Iraq and Afghanistan. She joined the National Guard in April 2010.

Gailey enlisted in the National Guard in 2004 and was previously deployed to Iraq in 2007.

Both were assigned to the Tulsa-based 700th Brigade Support Battalion, 45th Infantry Brigade Combat Team.