This is a standard template response which "highly-placed sources" issue after every terrorists attack. Check for most of the attacks in the past. "Sleeper cells", "telephonic calls" you will find these words all over the report. I think the "highly-placed sources" want to hide something. I think these "sources" want the game to continue so that they too can advance their vested interests. There's a lot of money at stake in the weapons, narcotics and human trafficking industry. The "sources" want to keep common people occupied in "War on Terrorism" and make merry. I am "hinting" equally at "sources" on both sides of the border. As the hindi saying goes "Tali ek haath se nahi bajti". Both sources must be discussing over drinks, "Kya farak padta hai? Apni tijoriyan bharte raho!"
Pity we all believe whole heartedly the "highly placed sources" who simply photocopy previous statements and issue them again :)
I dare them to reveal their identities if they are indeed saying the truth. Why fear?