"The constable was arrested and his service rifle seized. Investigation into the incident is underway," Superintendent of Police H G Lyngdoh said.
Assistant Commandant Mukesh Tyagi was shot dead by constable Arjun Deshwal at the Railway Protection Force (RPF) camp in Mawkyrwat town of the district bordering Bangladesh, Meghalaya Chief Electoral Officer F R Kharkongor told PTI.
Inspector Pradeep Meena and Sub-Inspector Om Prakash Yadav also suffered minor injuries, the CEO said.
Elections to Meghalaya's 60-member Assembly will be held on February 27. A large number of central security forces have been deployed in the state for the elections.
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