"Romanian soldiers, who were providing security, along with Train, Advise and Assist Command – South advisors returned fire in self-defense and killed the gunman," the statement added.
According to the statement, one Romanian soldier, as well as one Afghan police officer were injured and sent to medical facilities.
The United States and its allies launched a military operation in Afghanistan in 2001 following 9/11 terror attacks. The mission in Afghanistan ended on December 28, 2014. On January 1, 2015, NATO announced its new mission in the country, called Resolute Support, to train and assist the Afghan security forces.