An uneasy situation is prevailing in Ledo following grenade attack at the residence of a local Congress leader. According to information, miscreants hurled a grenade at the residence of Badal Dutta at around 8 in the evening on Sunday. No one has been injured but the building in which Das and his family house has been partially damaged. Top ranked police officials rushed to the spot. But they are clueless about the incident. Sources have not denied the role of coal mafia since Dutta is associated with coal business.