World Bulletin / News Desk
In a written statement, Stoltenberg said: "I apologize for the offence that has been caused. The incidents were the result of an individual’s actions and do not reflect the views of NATO.
"The individual in question was immediately removed from the exercise by the Joint Warfare Centre, and an investigation is underway.
"He was a civilian contractor seconded by Norway and not a NATO employee. It will be for the Norwegian authorities to decide on any disciplinary action."
The NATO chief added Turkey is a "valued NATO Ally, which makes important contributions to Allied security".