The attack was actually done by militant group not by Manipuri tribals.
Here are the tweets of Hrithik and his trollers:
My heartfelt condolences to d families of the 20 jawans killed in a mindless ambush by Manipur tribals. http://t.co/A91V4VnA1G salute.— Hrithik Roshan (@iHrithik) June 4, 2015
@iHrithik Not by Manipuri tribals. But by militant group. Don't blame innocent Manipuris.— Bhaskar Papukan (@BhaskarGogoi) June 4, 2015
Correction- unidentified Manipur tribal militant groups .. To be more precise.— Hrithik Roshan (@iHrithik) June 4, 2015