India says Pakistani troops have killed two of its soldiers and mutilated their bodies in the disputed Kashmir region.
The Indian army said Pakistani forces on Monday attacked one of their patrol units along the de facto border.
It added that mutilating the bodies was an "unsoldierly act".
Pakistan has denied the allegation, saying its army "was a highly professional force" that would "never disrespect a soldier".
India's Defence Minister Arun Jaitley said the incident was "reprehensible and inhuman", adding that such acts "do not take place even during war".
"Such acts are unheard of even during wars and definitely never in peace time," he said in a statement broadcast on Indian television.
"The entire country has full faith in the army that they will give the appropriate response."
Claimed by both countries, Kashmir has been a flashpoint for more than 60 years.
Kashmir - the region at the heart of dispute
India soldier 'beheaded' in Kashmir
Five things to know about Kashmir
- India and Pakistan have disputed the territory for nearly 70 years - since independence from Britain.
- Both countries claim the whole territory but control only parts of it.
- Since 1989 there has been an armed revolt in the Muslim-majority region against rule by India, which is mostly Hindu.
- Two out of three wars fought between India and Pakistan centred on Kashmir.
- A new war could be even more disastrous as both states now have nuclear arsenals.