Lieutenant Colonel Niranjan Kumar, an officer of the National Security Guard (NSG) who was a part of the bomb disposal squad, was killed yesterday, when a grenade that he was trying to dispose, went off. Born in Bangalore, he used to frequently visit his home state of Kerala. He was married in his village in Palakkad district three years ago. He is survived by his wife Radhika and 2-year-old daughter.

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