Updated at 1:11 a.m. ET Tuesday:
The Sri Lankan government has blamed the National Thowfeek Jamaath, a little known Muslim militant group, for the coordinated attacks on churches and hotels that rocked the island nation on Easter Sunday.
Sri Lanka Health Minister Rajitha Senaratne says the small group was aided by an international network.
"We do not believe these attacks were carried out by a group of people who were confined to this country," Senaratne said. "There was an international network without which these attacks could not have succeeded."