More than 200 people were killed in deliberate attacks that targeted worshippers during Easter Sunday services in Sri Lanka.
So far police say seven arrests have been made as three officers died during raids.
Officials say the attacks were carried out by religious extremists.
Sky’s Foreign Affairs Editor Deborah Haynes reports on the investigation to find those responsible.
SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews
Follow us on Twitter: https://twitter.com/skynews
Like us on Facebook: https://www.facebook.com/skynews
Follow us on Instagram: https://www.instagram.com/skynews
For more content go to http://news.sky.com and download our apps: