Why is al qeada claiming credit? And who says al qeada wouldn’t use a gunman? There was also a bomb that went off that is al qeada’s trademark. The two looked pretty close to each other in the crowd too. Maybe, al qeada knew the car was protected (bomb proofed) and they sent a gunman to be sure?
just for the record, elements of AQ that the Paki govt is trying to pin this on (a guy named Meshud) have actually dentied any involvement. So while AQ may have initally come out and claimed responsibility, they have since backed off.