Throw them the hell out of there now. Their companies should fire them or send them back. How the hell can you attempt to leave without a police escort in a region that has known militants operating in it. If they were allowed out and then were skinned alive, it would somehow be the administration's fault right?
Anyway like some posters said, including Indian ones if they went too rough with them i.e. proceeded to beat on them they would be out of a job, if they leave them alone then this happens.
For the record this isn't like the vast majority of tens of thousands of Chinese workers who are there.
Good, you should foot their bill then for coming back. Maybe they can go to more friendly countries where they can behave like that and get their skulls smashed in the process.
I also have no idea what the hell you are doing on this website, you are very anti-Pakistan but languish here.....