Police say one bomber was a woman and most were 'well educated' and 'middle class'. Around 60 people have now been detained in connection with the deadly attacks.
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PM Ranil Wickremesinghe said the government believed Sunday's attacks could not have been carried out without help from terror groups abroad. Also: The UN Security Council has adopted a reduced resolution on preventing sexual violence in conflict, and how a pacemaker tested on pigs could revolutionise how the devices are used.
The state defence minister, Ruwan Wijewardene, says the initial investigation has revealed the suicide bombings may have been carried out in revenge for the shootings at two mosques in New Zealand last month. Also: An advanced experimental vaccine against malaria is launched in Malawi, and they cause so much waste but would you drink from a bottle with a lid made from a recycled nappy?
The US is to end exemptions over Iran's oil sales. It will target countries, including China and India, that currently benefit from waivers to sanctions. Also: Billionaire brothers arrested in Algeria and marijuana's effect on the waistline.
Government sources say lethal attacks carried out by local Islamists with foreign support. 290 people have been confirmed killed and another injured in suicide-attacks on churches and hotels.
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More than two hundred die and hundreds more are injured in eight blasts which targeted busy luxury hotels and Easter services at churches. Also: a comic actor has won Ukraine's presidential election run-off, and there’s mistrust in Sudan over who will rule the country after months of unrest.