In Sri Lanka, the death toll from Sunday’s bomb attacks targeting hotels and churches has climbed to 359, as authorities said they defused another bomb in downtown Colombo and arrested more suspects. Sri Lankan officials apologized Monday for failing to respond to multiple tip-offs ahead of Sunday’s eight attacks. A confidential memo circulated among Sri Lankan security agencies gave the names, addresses and phone numbers of some of the suspects. It’s not clear why authorities failed to act on the warnings. One surveillance video showed a suspect wearing a backpack casually strolling toward St. Sebastian Church north of Colombo minutes before a bomb ripped through a crowd of Easter Sunday worshipers, killing more than a hundred of them. On Tuesday, the self-proclaimed Islamic State claimed responsibility for the bombings. The group circulated a video purporting to show eight members of a Sri Lankan cell pledging allegiance to the group.