Fida Khan said Friday that the helicopter suddenly went down a day earlier in the district of Mansehra of Khyber Pakhtunkhwa province and that all the 12 people on board were killed, AP reported.
He had no further details.
An army officer said the chopper was carrying a team including three doctors and paramedics from the military's medical wing, who were traveling to the northern city of Gilgit to evacuate a sick soldier when the helicopter went down amid bad weather.
The officer spoke on condition of anonymity because he wasn't authorized to speak to reporters.