Police officers and other officials in Pakistan's Punjab province have been suspended by chief minister Chaudhry Pervaiz Elahi for leaking the suspected attacker's confessional video statement after the gun attack on former prime minister Imran Khan.

Khan, 70, sustained a bullet injury on his leg when a gunman opened fire on Thursday on the container-mounted truck carrying him during his protest march, killing one person, but the former Pakistan prime minister was out of danger in what his party claimed was an "assassination attempt."