Four persons were injured, two of them seriously, when unidentified miscreants threw a crude bomb at a shop in Dimapur town on Friday, official sources said.
The injured comprised two shop workers and two customers, the sources said.
In a separate incident, one person was shot dead by unidentified gunmen when he was taking tea in a tea stall along with two of his friends.
The victim was identified as a vegetable seller.
Police later recovered two empty cases and one misfired bullet, the sources added.