Former prime minister Imran Khan and his party's Khyber Pakhtunkhwa Chief Minister Ali Amin Gandapur were on Tuesday booked in a new case of 'attempt to murder' linked to the death of a policeman during their party's protest here over the weekend. "The case has been registered on the state's behalf at federal capital's Noon police station under the sections of attempted murder, arson, attack on the state and violence against police personnel as well as anti-terrorism act (ATA) on Tuesday," The News International newspaper said..