KABUL, Afghanistan (AP) — Two members of the international Resolute Support mission in Afghanistan were killed Saturday in an attack on a base in southern Afghanistan, Nato announced.

According to a NATO statement, two Afghans wearing the uniforms of the Afghan National Defense and Security Forces (ANDSF) opened fire Saturday morning at an ANDSF compound. Other Resolute Support members returned fire and killed the shooters, the statement said.

After international forces wrapped up their combat mission at the end of 2014, Resolute Support was created with a coalition of international troops serving in a training and advisory role. The nationalities of the victims was not announced