The situation is tense is Shillong and other parts of Meghalaya after petrol bombs were hurled at the residence of Chief Minister Conrad K Sangma on Sunday. No damage has been reported so far. Curfew has been imposed in Shillong Agglomeration and internet services have been snapped in four districts following incidents of violence and arson on August 15, in the wake of HNLC militant leader Chesterfield Thangkhiew's killing.