Diwali had passed off peacefully, so the security establishment was caught completely off guard. In Guwahati, where 31 people were killed, the targets were well-chosen: the busy Ganeshguri square, less than a kilometre from the chief minister's secretariat; the crowded area near the deputy commissioner's office; and the business hub of Fancy Bazaar.
The other blasts took place in the western towns of Kokrajhar and Barpeta Road. The first is the headquarters of the Bodoland Territorial Council (BTC), run by Congress ally Bodo People's Front (BPF).