An official said four would-be suicide bombers have been killed in a premature explosion in southern Afghanistan, AP reported. Deputy provincial police chief Fazel Ahmad Sharzad said the suspects were traveling from the Panjway district to Kandahar when the blast occurred about 8 p.m. Wednesday. He said the men were planning an attack in Kandahar but explosives in the car detonated before they reached the city. He didn"t say what the target may have been.