Officials say talks on extending the 8-year mission stalled over the question of legal immunity for the foreign trainers — an issue that earlier torpedoed plans to keep a residual US military presence in the country.

The alliance said in a statement Monday that despite “robust negotiations” agreement on the extension of the program was not currently possible. It says NATO’s governing body will soon decide on the issue.

NATO has about 130 advisers from 13 member nations and Ukraine in Iraq.