these will keep happening by these extreme terrorists...u cant stop their ideology...as long as there are people of other religions...these will happen http://www.cnn.com/2008/WORLD/asiapcf/05/13/india.bombs/index.html
So far no group has claimed responsability and no group has been identified with certain level of certainty ...with regard to responsability. http://www.csmonitor.com/2008/0515/p04s04-wosc.html The ongoing monthly or bimonthly bombings have to be a major concern of the Indian population and government.