Three American troops were wounded Sunday when an Afghan soldier opened fire in southern Helmand province, officials said, in the first known "insider attack" on global forces this year.
Since 2008, there have been 94 "insider" attacks in Afghanistan, with at least 150 foreign soldiers killed and 187 wounded, according to the Long War Journal blog.
The latest insider attack on USA forces in Helmand comes as counter-terrorism operations are underway in this province which are jointly being conducted by the Afghan National Defense and Security Forces (ANDS) and the air support of the United States forces.
Since October, 12 Americans have been killed in Afghanistan and five Americans are now being held hostage there.More news: Lotus takes even lighter touch with new Elise Sprint
The attack occurred on a base in Helmand, Afghanistan's largest province and one of the most turbulent. Salvin declined to offer more details.
A security official, who spoke on condition of anonymity because he was not authorised to release information, said six police were killed and five others were wounded in the assault.
The Pentagon has 8,400 troops deployed in Afghanistan to train and advise Afghan forces; most rarely participate in direct combat.
Army General Tony Thomas, the head of the military's Special Operations Command, has said that during a visit to military headquarters in Tampa, Fla., last month, President Trump made clear that he wants to emphasize counterterrorism missions by the military's elite forces. There are roughy 8,400 US troops in the country, more than Iraq and Syria combined.