At least four people were killed and nine others got injured in a crude-bomb explosion in West Bengal's Birbhum district on Friday. Reportedly, a sudden explosion occurred in the afternoon when a gang of miscreants was making bombs on the outskirts of the village. Somehow the bombs exploded in the afternoon, killing four on the spot. The people deceased have been identified as local miscreants who were making crude bombs as a part of their preparation to continue an ongoing fight between two groups. Earlier last month, two people were killed and another injured in a crude bomb explosion in West Bengal.