The National Accountability Bureau (NAB) on Friday summoned Pakistan Tehreek-e-Insaf (PTI) Chairman Imran Khan on August 7 in an ongoing inquiry against his alleged misuse of Khyber Pakhtunkhwa government's helicopters.

The NAB official said, "Imran used two helicopters belonging to the KP government for a total of 74 hours."

The officials further said, "Statements of KP CM Pervez Khattak and aviation authorities in the case have been recorded." 

Imran Khan is accused of illegally using an Mi-17 and an Ecureuil helicopter belonging to the KP government for a total of 74 hours, causing a loss of Rs 2.1 million to the national treasure.

Earlier, on July 18, Imran had sought time to appear before NAB, saying, he 'was busy with election campaigning'.

On January 29 this year, according to media reports, the former KP government spent millions of rupees on Imran's use of the provincial government's helicopters.

Afterwards, The Chairman NAB Justice (retired) Javed Iqbal ordered the bureau to initiate a investigation against the PTI Chairman and then-KP chief minister Pervez Khattak over unofficial use of two government helicopters by misusing authority.

Khattak has already appeared before NAB in the past regarding the case.