Sri Lankans observed a national day of mourning on April 23 that was called to grieve the loss of at least 290 people killed in the Easter Sunday terror attacks on churches and hotels in and around the capital Colombo. /Xinhua Photo

Families and communities across the country have organized vigils and begun to bury victims, who also include nationals of China, the U.S., Denmark, Japan, Pakistan, Morocco, India and Bangladesh. /Xinhua Photo

Sri Lankan authorities reportedly received warnings of potential attacks two weeks before the Easter carnage which also wounded 500 people, a cabinet spokesman told a press conference a day after the bombings. /Getty Images

The government said a local militant group is behind the deadly attacks and is currently investigating possible international links. /Getty Images