At least 14 tribal civilians and one security personnel were mistakenly killed when Indian forces opened indiscriminate fire in the remote northeastern state of Nagaland, government and military officials said on Sunday.

The incident took place in and around Oting village in Mon district, bordering Myanmar, during a counterinsurgency operation conducted by members of the Assam Rifles, a part of Indian security forces deployed in the state, said a senior police official based in Nagaland.