NATO's International Security Assistance Force (ISAF) in Afghanistan says one of its helicopters has gone down in the northern province of Baghlan.
ISAF spokesman Will Griffin said the aircraft had a "hard landing," but offered no further details.
Taliban spokesman Zabihullah Mujahid said in a statement that Taliban militants had shot down the helicopter.
However, another coalition spokesman, Luca Carniel, said there was no report of insurgent activity in the area at the time of the incident.
Provincial police chief Assadullah Shirzad said the helicopter made an emergency landing but then flew back to its base on its own.
Abdul Jabar Islami, the head of the province's Borka district, where the incident reportedly took place, told RFE/RL that the helicopter went down overnight in the village of Alaf Baig.
Based on reporting by AP and RFE/RL's Radio Free Afghanistan