Pakistani reporting in!
Rescue efforts are underway...it was real quick response with the airforce being involved immediately and heavy machinery being airlifted into the area to aid rescue operations.
I am doubtful they are survivors but the rescuers are working feverishly as if there could be survivors. And yes this is the highest battlefield in the world. You can see some pictures here...
Siachen - Image and Media Section - .::UrbanPK::.