Video shows Imran Khan standing at the front of an open top container truck during a protest march to demand snap elections when a gunman fired at the politician with an automatic pistol (left). As the sound of bullets filled the air, a shocked Khan, 70, tried to take cover but he was shot in the leg. Khan's team quickly surrounded him, as people in the crown can be heard screaming. Footage from the scene shows the suspected gunman firing a burst of shots at Khan. A second man is seen trying to wrestle the gun from the would-be assassin, but the gunman manages to escape. Khan's ex-wife, British socialite and screenwriter Jemima Goldsmith, tweeted a picture of the man who wrestled the shooter, hailing him as a 'hero' (bottom right). Video later shows Khan wearing a bandage on his leg, waving to supporters (top right) after getting shot before he was helped down from an open top container truck and placed carefully into a vehicle. Khan began his march last week as part of his campaign aimed at forcing Prime Minister Shehbaz Sharif and his government to hold snap elections after he was ousted following a no confidence vote. Khan, who has also been a vocal critic of Pakistan's powerful military for supporting the current PM, accused Sharif, Interior Minister Rana Sanaullah and Major General Faisal of being behind the attack.