This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
Sri Lanka's Presidential Commission of Inquiry conducted a two year formal investigation into the Easter Sunday bombings and found that state intelligence agencies had received specific advance warning of the plot, reportedly from a foreign partner service, and that senior officials, including the sitting president, failed to act on it in time to prevent the attack. The Commission's 2021 final report recommended criminal proceedings against several named officials for that failure, an unusually direct domestic accountability finding against a sitting government's own security establishment. Sirisena has publicly rejected the finding against him, telling the BBC that the then defence secretary and police chief, who did not brief him on the warning and who were already facing prosecution over the same lapse, bore responsibility rather than the presidency.
The death toll itself was not settled to a single figure even in the Commission's own record: reporting places the number of dead between 253 and 269, a range this atlas records rather than a single total, reflecting the difficulty of a final count amid a mass-casualty attack across six separate sites. No international body has made a genocide or crimes against humanity determination for the bombings, since National Thowheeth Jamaath's attack falls under terrorism rather than that legal vocabulary, but the domestic inquiry's finding of a preventable intelligence failure remains the defining question the bombings left unresolved, distinct from the question of who carried them out.