He said the two suspects told police they picked up the bomber a day before the attack at a bus depot in Rawalpindi, and the bomber stayed overnight with Rafaqat before they took him to the Rawalpindi park hours before the attack to do reconnaissance.

CNN: Two admit arming Bhutto suicide bomber

The Malian army has been fighting Islamist rebels in the northern city of Timbuktu after a suicide bomber attempted to attack an army checkpoint.

BBC: Timbuktu clashes between Mali army and Islamists

The two suspects told police they picked up the bomber a day before the attack at a bus depot in Rawalpindi, and the bomber stayed overnight with one of the suspects, according to Majeed.

CNN: Investigator details Taliban chief's alleged role in Bhutto's death

Police initially said they ramped up security around Bhutto due to intelligence that a suicide bomber was planning to attack her in Lahore.

NPR: Bhutto: Pakistan Power Sharing Now Not Likely

The police chief in Paktia province, where the attack happened, said the bomber detonated his explosives around midday.

BBC: Afghan children die as suicide bomber targets soldiers

Senior international security experts have suggested, for example, that such an approach would have increased the chances that suspected shoe-bomber Richard Reid would have been stopped before he successfully boarded an airplane he intended to attack in December 2001.

CNN: Why profiling doesn't work

On the day of the attack, McHugh was on foot, about 25 to 30 feet away from the bomber.

CNN: Pressing on at war when 'good men' die

Cheema said the bomber apparently was unable to get through security to attend Bhutto's rally, so he carried out the attack as she left the Rawalpindi park.

CNN: Two admit arming Bhutto suicide bomber