The 70-year-old former cricket hero who become prime minister in 2018 has been embroiled in a confrontation with the powerful military since he was ousted in a no-confidence vote last year.
Khan was freed days later but new charges against him have been piling up.
The military, which denies involvement in civilian politics, initially saw Khan with his conservative, nationalist agenda as a leader who shared their interests.
But as prime minister, Khan took steps that angered the generals, in particular in connection with security sector appointments.
The prime minister who replaced Khan, Shahbaz Sharif, has rejected his call for an election before one is due by late this year.
Persons:
Imran Khan, Khan's, Khan, Gohar Khan, Shahbaz Sharif, Asif Shahzad, Robert Birsel
Organizations:
Pakistani, Court, Thomson
Locations:
ISLAMABAD, Islamabad