New video images of the final moments of Benazir Bhutto's life have emerged showing the clearest pictures yet of the moment a gunman opened fire on her.The former prime minister was killed in a gun and bomb attack on Thursday as she stood up through the sun-roof of her bullet-proof vehicle to wave to supporters as she left an election rally in the city of Rawalpindi.The government has blamed al Qaida.The pictures showed two men standing in the crowd outside the rally ground before Bhutto left.One was a clean-cut young man wearing sun glasses, a white shirt and dark waist coat. Behind him stood a man with a white shawl over his head, who was believed to be the bomber.Another photograph shows the clean-cut man pointing a pistol at Bhutto as she left the rally.Authorities said three shots were fired at her moments before a suicide bomber set off explosives. As well as Bhutto, 23 people were killed.Authorities have not said how many attackers they believed were involved.Senior police and government officials declined immediate comment saying a four-officer team was handling the investigation.The government said Bhutto was killed when the force of the blast smashed her head into a lever on the sun-roof, which fractured her skull.Her party dismisses that as "ludicrous" saying she was killed by a bullet in the head.Doctors did not carry out a post-mortem of Bhutto's body on the instructions of her family, officials say.The Interior Ministry said her body could be exhumed for more tests if her party wanted.© Independent Television News Limited 2007. All rights reserved.