Indian Police say Indians also involved in Mumbai...

If they dont have enough info then they dont have enough info.. Maybe the investigation requires some cooperation?!?!
Perhaps you dont understand how an investigaton works? Perhaps you dont know what is happening behind closed doors...
While Pakistan undertakes a serious investigation, you people are busy demonizing all Pakistanis, and bitter Indians like you are ranting on internet forums.
Holbrooke came, so what? Pakistan is doing what it has to do...

But take credit for whatever you can. Salvage what dignity you have left.