The way bombs exploded clearly indicate that its target is to divert the attention of the media and whole country for a few weeks. The sponsor can be anyone who wish to do something in the smoke. Don't blindly believe all these inspired by relegious extremists. But the sponsors pay and use the extremists for the mission to get prolonged effect and double impact. Insted of panicking behind bombs, we should think who is doing something that is likely to get attention/resistance of the media and people.