Amrullah Saleh, head of the investigating team and a former intelligence agency chief, said today that without US air support, government forces would have been unable to take back the city.
Kunduz city, capital of the province of the same name, was overrun by Taliban gunmen on September 28. The insurgents held the city for three days before a government counter-offensive was launched.
Troops took more than two weeks to bring the city back under government control.