In Sri Lanka, investigators have learned more about the Islamist militants they blame for a series of Easter Sunday bombings. At least 58 people have been arrested, many of them from well-off Sri Lankan families whose neighbors expressed shock at…

The death toll from Sri Lanka's Easter massacre has risen to 321, as the country observed a national day of mourning Tuesday. Although the Islamic State made an unconfirmed claim of responsibility for the bombings, officials in Colombo blamed a…