0115 GMT August 21, 2019
Recriminations have flown since terrorist suicide bombers blew themselves up in packed churches and luxury hotels on Sunday, in attacks claimed by the Daesh terrorist group, AFP reported.
Overnight, security forces using newly granted powers under the country's state of emergency arrested 18 more suspects in connection with the attack, as the toll rose to 359.
Police have so far arrested 58 people, all Sri Lankans, and security remains heavy, with bomb squads carrying out several controlled explosions of suspect packages on Wednesday.
But the government faces anger over revelations that specific warnings about an attack went ignored.
Sri Lanka's police chief issued a warning on April 11 that suicide bombings against "prominent churches" by local extremist group, National Thowheeth Jama'ath were possible and alerts had been given by a foreign intelligence agency.
CNN reported that Indian intelligence services had passed on "unusually specific" information in the weeks before the attacks, some of it from a Daesh suspect in their custody.
But that information was not shared with the prime minister or other top ministers, the government said.
"It was a major lapse in the sharing of information," Deputy Defense Minister Ruwan Wijewardene conceded at a press conference on Wednesday.
"The government has to take responsibility."
Chilling CCTV footage has emerged showing one of the attackers calmly patting a child on the head and shoulder moments before he walked into the packed St. Sebastian's church and detonated his bomb among those attending Easter Mass, unleashing carnage.
President Maithripala Sirisena, who is also defense as well as law and order minister, pledged Tuesday to make "major changes in the leadership of the security forces in the next 24 hours."
"The restructuring of the security forces and the police will be completed within a week," he said.
New details emerged about some of the bombers on Wednesday, with Wijewardene saying one had studied in Britain and then did postgraduate studies in Australia before returning to Sri Lanka.
"Most of them are well-educated and come from middle-, upper-middle class families, so they are financially quite independent and their families are quite stable financially, that is a worrying factor in this," the minister added.
Experts say the bombings bear many of the hallmarks of Daesh attacks, and the government has suggested local militants could not have acted alone.
But it has not yet officially confirmed any Daesh role in the blasts against three churches packed with Easter worshippers and three high-end hotels.
A desperate search was underway for other suspects linked to the blasts, including the head of a local extremist group believed to have played a key role in the attacks.
The government has said the National Thowheeth Jama'at group was behind the attack, perhaps with international help, and its leader Zahran Hashim remains unaccounted for.
He appears to be among eight people seen in a video released by Daesh on Tuesday, leading seven others in a pledge of allegiance to Daesh chief Abu Bakr al-Baghdadi.
It was not yet clear whether Hashim was among the suicide attackers or had escaped after the blasts.
Government officials have said they cannot rule out further attacks while suspects remain at large.
In all, nine people are believed to have blown themselves up in Sunday, either during attacks or when police attempted to arrest them.
Sri Lankan police sources have told AFP that two brothers, sons of a wealthy Colombo spice trader, blew themselves up at the Shangri-La and the Cinnamon Grand hotels.
Their father is now one of the 58 in custody.
The Kingsbury hotel in the capital was the last one hit. A fourth planned attack on a hotel failed, authorities said. The would-be attacker was followed back to a Colombo lodge, where he blew himself up, killing two people.
Sources close to the investigation said two more people – a man and a woman – blew themselves up at another location as security forces launched a raid. Those blasts killed three police.
Work was continuing to identify foreign victims in the blasts.
A Danish billionaire lost three of his children in the attacks, a spokesman for his company said.
Eight Britons, 10 Indians, four Americans and nationals from Turkey, Australia, Japan and Portugal were also reported killed.
The United Nations said at least 45 children, Sri Lankans and foreigners, were among the dead.