This is awful and getting worse. One aspect that could have led to police downplaying the threat of impending attacks is that prior to this, the terror group in question was evidently not even a terror "B team". For example, their past activities were apparently limited to making an inflammatory mosque sermon(s) about Buddha as well as possibly vandalizing some Buddhist images. This led to an investigation under Sri Lanka's religious provocation laws. The sudden move from " obnoxious idiots" to at least planning a deadly attack to successfully coordinated huge attacks ala Al Queda or ISIS level may well indicate foreign planning, leadership and funding.