Three American special forces soldiers were shot dead by a man in Afghan uniform in what appeared to be the latest incident of local forces turning their weapons on their foreign allies.
The Americans were killed after being invited to dinner to discuss security in Sangin district of Helmand on Thursday evening.
The shooting was at least the third incident this week where Afghan forces have opened fire on foreign forces.
Thursday night’s shooting appeared to be a carefully planned attack, Afghan officials said.
American special forces soldiers had been invited to break the Ramadan fast at a house in the Sarwan Qala area by a police commander called Assadullah.