Pakistan Tehreek-e-Insaf (PTI) Chairman and Prime Minister-in-waiting Imran Khan was questioned by the National Accountability Bureau (NAB) in Peshawar on Tuesday in a case pertaining to his alleged misuse of the provincial government's helicopters during his party's tenure in Khyber Pakhtunkhwa.

The anti-corruption body is investigating Khan for causing a Rs 2.17 million loss to the provincial exchequer by using the Khyber Pakhtunkhwa government's helicopters -- Mi-17 and an Ecureuil helicopter -- for 74 hours.