The incident took place soon after Congress supporters gheraoed the DC's office on Thursday, expressing dissatisfaction over the Mairang assembly constituency results.
Several people were injured and one person was found dead in a mysterious circumstance after post-poll violence erupted in at least three assembly constituencies in Meghalaya, officials said on Friday.
Conrad Sangma, who resigned as the chief minister on Friday to state a claim for the next government, called the incident "unfortunate".
He confirmed that the "violence took place at different places but situation is under control". He even urged people and all political parties to maintain peace. He said, "violence is not the way forward and should not indulge in any kind of violence."