By Carlo Muñoz - 10/01/12 05:13 PM EDT
Members of the team were conducting joint combat patrols in Khost province when a suicide bomber rammed the unit with a motorcycle laden with explosives, according to the Associated Press.
Six civilians were also killed and roughly 60 wounded in the bombing, which Taliban forces in the region claimed responsibility for.
The attack on the joint American-Afghan unit comes days after Gen. John Allen, head of all U.S. and coalition forces in Afghanistan, rescinded an order on Thursday to cap the number of joint combat operations with Afghan units.
Joint operations with Afghan National Security Forces (ANSF) were limited to the battalion level and above under Allen's order.
The decision to conduct any joint mission below that level would be left up to commanders in the field.
That order, along with the suspension of U.S. training missions of Afghan forces, was designed to help curtail the recent rise in "insider" attacks by Afghan soldiers against American forces.
Over 50 allied troops, a majority of them American, have died at the hands of their Afghan counterparts since the beginning of the war in 2001.
Most of those attacks have occurred within the past six months.
On Saturday, Afghan forces killed a U.S. solider in an apparent insider attack in eastern Afghanistan, according to the Associated Press. A NATO contractor and two Afghan soldiers also died in the strike.
It was the first insider attack to take place since Allen withdrew the order to limit interaction between American and ANSF units.