Lost on three fronts badly - referendum, war & terrorism, to change the status-quo of Kashmir, Pakistan is remained with just one option - Diplomacy or 'Internationalize the Kashmir Issue'. Diplomacy is a very powerful tool if used properly, this is what the Palestinians achieved in 2012 when there UN status was upgraded & international community accepted TACITLY that a country called Palestine do exist. This when Israel's military might is unmatched in entire middle-east.
Pakistan has time & again, used any sort of platform available to make International community aware that here we have a so-called Disputed territory called Kashmir, be it OIC, or UN GA or even Kargil was not a military operation but an operation to bring the world to notice about Kashmir dispute & to force India to find a solution for it. Yes, India is powerful enough a country to dodge any pressure but if whole world will have a feeling that it could result into a nuclear war b/w the two nations & if all countries started demanding solution, India cannot remain blind either.
This is what Pakistan is trying to achieve through Diplomacy (though unsuccessful till now), it is playing with the fears of the world that a nuclear war is still a possibility & u can't see THIS incident separated from the larger designs of Pakistan on Kashmir (remember LOC is not International border), why else do u think Pakistan within hours of the incident asked for a UN monitored probe where some people from powerful countries like US, UK, France, etc. will come & make a local Incident an International issue?? I know that a UN monitored probe will not at all change the status-quo, but Diplomacy is about Baby Steps & in it nothing can change immediately. The issue is why should we let enter some foreign nationals on OUR TERRITORY that will inspect everything - LOC, Dead Bodies, surrounding areas, etc. & make a mockery of the death of our soldiers?? Does US let Indian citizens to probe any incident on it's soil??
I know nor Indians trust Pakistanis on this nor Pakistanis on Indians so the Joint probe option is also ruled out.
+ as this incident goes there can be only three possibilities:
1. Either it were the regular PA soldiers.
2. Either the militants.
3. OR as the conspiracy theorists like to point out, IA itself.
Now, i cannot say anything about Possibility 1 or 3 as i have no knowledge about it, but if the possibility is #2 than i should tell u that in is not at all possible without the active support of the PA, since LOC was crossed & soldiers were killed & mutilated, this can't be done by irregulars alone, right??
The only option which i think is possible here is that we can have INDEPENDENT Post-mortem report of the bodies & Pakistan should accept whatever it's finding will be.