few blind eyes in indo-pak border in kashmir? thats pretty close to impossible. even if IA doesnt know it, PA must surely know becoz it has launching pads of terrorists who are launched by giving them cover fire by breaking the ceasefire. infiltration is easy only if one army is helping you against the other. not when if both are hostile to you. in this case, there must be a friendly army. and it is not difficult to guess which one it could be.