The Sri Lankan government said the Easter Sunday bombings which killed at least 290 people were carried out by an Islamist terror group with the assistance of an global network.
The sophisticated planning behind the attacks that struck churches and hotels shattering a decade-long calm in the island nation has taken aback investigators and officials.
Sri Lankan Army soldiers secure the area around St. Anthony's Shrine after a blast in Colombo, Sri Lanka, Sunday, April 21, 2019.
"We do not believe these attacks were carried out by a group of people who were confined to this country", Senaratne said.
Bloomberg reported Muslims in the country were not surprised that an attack would be launched by National Thowhe Jamaath.
The decision was made during a meeting of the National Security Council (NSC) chaired by President Maithripala Sirisena.
Sri Lankan police have arrested 24 people in connection with the series of suicide bombings targeting hotels and churches, all allegedly associates of National Thowheeth Jama'ath (NTJ), a group allegedly funded and supported by Pakistan's Inter-Services Intelligence (ISI).
The group has no history of large-scale attacks but came to prominence previous year when it was blamed for damaging Buddhist statues. The main hospital in the city received more than 300 people with injuries in the hours following the blast. Police were attempting to defuse explosives in a vehicle used by the attackers when it blew up. "She was well respected and an inspirational chef for Sri Lankans". Hundreds more were injured. Gvernment is trying to ascertain how the suicide bombers were prepared.
He said he and a travel partner were having breakfast at the Shangri-La when two blasts went off. He noted the Tamil Tigers were never able to mount such a coordinated attack in the capital, Colombo.
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Calling for the resignation of the Inspector General of Police, Senaratne said: "This morning (Monday) the President, the Prime Minister and State Defence Minister met for the first time".
Christians are a small minority in Sri Lanka.
Sri Lankan officials were reportedly warned earlier this month that a Muslim jihad group planned to attack Christian churches on Easter Sunday.
"These horrific attacks make it vital for the Sri Lankan authorities to ensure victims get the help they need, act to prevent further violence, and bring those responsible to justice according to human right standards", Ganguly said.
Police are to investigate whether warnings of attacks were ignored or missed before the violence in eight locations across the country.
It is unclear what precautions if any the Sri Lankan government took after learning about the possible attack.
Prime Minister Ranil Wickremesinghe told the nation in an address there were warnings but authorities didn't pay enough attention.
"That is bad news for the country where the memories of the civil war are still very much alive", said Raffaele Bertoni, head of debt-capital markets at Gulf Investment Corp.in Kuwait City.
"We went down the fire escape and into the auto park and just got as far away from the building as we could".