Pakistani security officials inspect the site of a bomb explosion in a fruit and vegetable market. – Photo by AFP Pakistani investigators gather around a crater following an explosion in Islamabad, Pakistan, Wednesday. – Photo by AP Pakistani security officials inspect the site of a bomb explosion in a fruit and vegetable market in Islamabad. – Photo by AFP Pakistani investigators look for evidence at the spot of an explosion in Islamabad, Pakistan. – Photo by AP A Pakistani bomb disposal expert searches the site of a bomb explosion at the fruit and vegetable market in Islamabad. – Photo by AFP Police cordon off the area of a blast in Islamabad, Pakistan, Wednesday. – Photo by AP