It appears from newspaper reports that some Pakistani mujahideens (irregulars) occupied the Kargil heights sometime around April 1999. Later on, they were joined by regular Pakistan troops. Their overall numbers might have been a few thousand (some estimates talk of about 1000 numbers). Again, going by newspaper reports it would appear that the Pakistanis built some bunkers on those heights. India remained blissfully unaware of these major incursions till some shepherds informed of the same; So much for Indian Intelligence.
…India would not cross the LoC. Hypocritical moral posturing? Why? Pray, why would we not cross the LoC when the other party has? …let us not forget that it was our pseudo-moral posturing and lack of aggressive spirit (i.e. no LoC crossing) that resulted in such high casualties.