No shots fired, and the troops were actually fighting with rocks and iron bars, and most of the Indian casualties died of exposure due to the difficulty in recovering them in that area.
Bit of a local breakdown in manners, apparently, while negotiations were in progress. I can just about remember the 1967 border clashes, which involved artillery duels, and this isn't as bad as that.
https://www.businessinsider.com/indi...20-6?r=US&IR=T
Once both sides have nukes, loosing off anything that goes bang is going to earn you an 'interview without coffee' (as the British Army calls it) with your commanding officer, and you won't like that.