It's doesn't please me that Indian officials are pointing at Pakistan. There is already enough tension there to trigger more violence. The Al Quida connections doesn't seem to be very strong either, but it's being thrown out there as a possibility. The focus of the attacks - on the places where the wealthy and affluent Indians and Foreigners - hang out is the most telling to me. I would suspect home grown as well.
Mumbai has grown so rapidly in the recent past. Financially, it is very strong and continues to be an up and coming world financial powerhouse. It is also home to some of the most horriffic slums - made more horriffic by their proximity to wealth. I don't doubt the strife that alone would cause.
Here's a
May 07 National Geographic article about one of the largest Bombay slums with some haunting pictures.