The wounded service members are in stable condition and are receiving treatment, according to the NATO Resolute Support, a NATO-led coalition that aids Afghan security forces.
A US service member was killed and two others wounded in what North Atlantic Treaty Organisation is calling "an apparent insider attack" in Afghanistan Saturday. But a statement by the Taliban reported by Reuters on Saturday said an Afghan soldier had fired on American troops in southern Afghanistan's Uruzgan province.
"The wounded service members, who are in stable condition, are now being treated", said the statement. Additional information was not immediately available and the incident was under investigation.
The service branch of the troops and the province in which the suspected attack occurred have not been made public. The specially trained unit's 800 members are meant to advise Afghan forces in small teams, embedding more closely with their Afghan partners than conventional units. In that incident, a Romanian NATO soldier was injured.
There are about 14,000 US military personnel in Afghanistan, majority serving as trainers and advisers with the Afghan military in their fight against the Taliban and ISIS. The last insider attack that resulted in a U.S. casualty occurred two months earlier, in June of past year.