Over a dozen suspects were arrested following the bombings.

https://www.youtube.com/watch?v=VDxj2Xh01O0

The Islamic State claimed responsibility for the massacre on Tuesday.

ISIS has officially claimed responsibility for the Sri Lanka attacks via their Amaq news agency. https://t.co/CMJf3LP02E pic.twitter.com/KKqWOt8Xxi

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#ISIS claim #SriLankaTerrorAttack via Amaq. Even before the formal claim of responsibility #IS supporters circulated various pics to celebrate #SriLankaAttacks on various social media forums. pic.twitter.com/PB1aaZ4vg8

FOX News reported:

ISIS claimed responsibility Tuesday morning for the coordinated Sri Lanka Easter bombings as the death toll in the massacre has risen to 321.

The international terror group – despite not producing evidence to prove their involvement – tweeted via its propaganda wing that the violence was carried out by “fighters of the Islamic State,” reports said.

The terror group’s assertion comes amid Sri Lanka’s minister of defense claiming the bombings at multiple churches and hotels in Colombo were “carried out in retaliation” for attacks on mosques in Christchurch, New Zealand on March 15 by an apparent white supremacist gunman.