Pervez Musharraf kept such a tight lid on intrusions by Pakistani troops into Kargil in 1999 that the ISI learnt of the development when it intercepted Indian Army communications, reveals a retired general in his book.

Lt Gen (retired) Shahid Aziz, who headed the analysis wing of the ISI at the time, writes that when he brought "strange wireless intercepts" to the notice of then ISI chief, Lt Gen Ziauddin Butt, on May 3 or 4, 1999, he asked Aziz to keep the documents with himself.

In his book "For How Long This Silence", Aziz says the operation was executed by Musharraf, Chief of General Staff Lt Gen Aziz Muhammad Khan, 10 Corps chief Lt Gen Mahmud Ahmad and Maj Gen Javed Hassan.