Authorities said the attack came at around 8:00 am, when security personnel were screening tribesmen to allow them inside the offices enclave. The victims were among hundreds of thousands of people who had fled the fighting between the military and the Taliban over the past three years. The bomber first lobbed a grenade and then detonated the explosives in the midst of a crowd of more than 300 people waiting at a checkpoint for handouts from the WFP in Khar, the main town in Bajaur. It was the worst attack in Bajaur Agency since security forces claimed victory against Taliban insurgents in March this year. A burqa-clad suicide bomber killed 47 people and injured over 100 in an attack on a World Food Programme (WFP) ration distribution point in the Bajaur tribal agency on Saturday.