Group Captain Varun Singh was among the 14 people traveling in the Indian Air Force (IAF) helicopter that burst into flames.
The deaths of Indian defense chief Gen. Bipin Rawat and his wife were confirmed in a tweet by the Indian Air Force.
Locals in Nagaland have frequently accused forces of wrongly targeting innocent locals in their counterinsurgency operations against rebel groups.
Both sides have observed a long-held protocol to avoid using firearms on the sensitive, high altitude frontier running through the western Himalayas, though this has not prevented casualties.
His comments prompted Beijing to call for restraint at the tense border area in the northern Himalayan region of Ladakh.
India and China fought a brief but bloody border war in 1962 and distrust has occasionally led to flare-ups ever since.
In keeping with its commitment to Make-in-India, KRAS is a Joint Venture between RAFAEL Advanced Defense Systems Ltd. and Kalyani Strategic Systems.
An estimated $1.822 trillion spent around the world; Israel ranks 17th out of top 40 military spenders for a second year in a row.
Israel becoming one of the largest arms suppliers to India, which has spent some $100 billion on defense in the past decade.