Sri Lankan security personnel walk through debris following an explosion in St Sebastian's Church in Negombo. AFP
Police on Monday said they had found 87 bomb detonators at a Colombo bus station, a day after a string of attacks on churches and hotels that killed nearly 300 people.
A statement said police found the detonators at the Bastian Mawatha Private bus stand, 12 of them scattered on the ground and another 75 in a garbage dump nearby.
The Sri Lankan government believes a local extremist group called National Thowheeth Jama'ath (NTJ) was behind deadly suicide bomb attacks that killed nearly 300 people, government spokesman Rajitha Senaratne said on Monday.
Senaratne, who is also a cabinet minister, added that the government was investigating whether the group had "international support."
Documents seen by AFP show Sri Lanka's police chief issued a warning on April 11, saying that a "foreign intelligence agency" had reported NTJ was planning attacks on churches and the Indian high commission.
Authorities lifted a curfew in the Sri Lanka on Monday, a day after 290 people were killed and about 500 wounded by a string of bombings that tore through churches and luxury hotels on Easter Sunday.
There was still no claim of responsibility for the attacks on two churches and four hotels in and around Colombo, the capital of predominantly Buddhist Sri Lanka, and a third church on the country's northeast coast.
A government source said President Maithripala Sirisena, who was abroad when the attacks happened, had called a meeting of the National Security Council early on Monday. Prime Minister Ranil Wickremesinghe would attend the meeting, the source said.
There were fears the attacks could spark a renewal of communal violence, with police reporting late on Sunday there had been a petrol bomb attack on a mosque in the northwest and arson attacks on two shops owned by Muslims in the west.
Sri Lanka had been at war for decades with Tamil separatists but extremist violence had been on the wane since the civil war ended 10 years ago.
The South Asian nation of about 22 million people has Christian, Muslim and Hindu populations of between about eight and 12 percent.
The island-wide curfew imposed by the government was lifted early on Monday, although there was uncharacteristically thin traffic in the normally bustling capital.
Soldiers armed with automatic weapons stood guard outside major hotels and the World Trade Centre in the business district, where the four hotels were targeted on Easter Sunday, according to a Reuters witness.
Scores of people who were stranded overnight at the main airport began making their way home as restrictions were lifted.
The government also blocked access to social media and messaging sites, including Facebook and WhatsApp, making information hard to come by.
Wickremesinghe acknowledged on Sunday that the government had some prior information about possible attacks on churches involving a little-known extremist group, but said ministers had not been told.
Sri Lankans accounted for the bulk of the 290 people killed and 500 wounded, although government officials said 32 foreigners were also killed. These included British, US, Turkish, Indian, Chinese, Danish, Dutch and Portuguese nations.
A British mother and son eating breakfast at the luxury Shangri-La hotel were among those killed, Britain's The Telegraph newspaper reported.
One Australian survivor, identified only as Sam, told Australia's 3AW radio the hotel was a scene of "absolute carnage".
He said he and a travel partner were also having breakfast at the Shangri-La when two blasts went off. He said he had seen two men wearing backpacks seconds before the blasts.
"There were people screaming and dead bodies all around," he said. "Kids crying, kids on the ground, I don't know if they were dead or not, just crazy."
There were similar scenes of carnage at two churches in or near Colombo, and a third church in the northeast town of Batticaloa, where worshippers had gathered for Easter Sunday services. Pictures from the scene showed bodies on the ground and blood-spattered pews and statues.
Dozens were killed in one of the blasts at the Gothic-style St. Sebastian church in Katuwapitiya, north of Colombo. Police said they suspected that blast was a suicide attack.
Three police officers were also killed when security forces raided a house in Colombo several hours after the attacks. Police reported an explosion at the house.
UAE denounces attacks
The United Arab Emirates has condemned the terrorist bombings that targeted churches and hotels in Colombo, Sri Lanka.
In a statement today, the Ministry of Foreign Affairs and International Cooperation (MoFAIC), said that the UAE affirmed its firm stance against all forms of violence, terrorism and extremism, targeting all without distinction between religion and race.
The statement added the UAE stands in solidarity with the government and people of Sri Lanka in their fight against violence and extremism, calling upon the international community to close ranks and uproot the scourge of terrorism in order to ensure international peace and security.
UAE has expressed condolences to the government of Sri Lanka and to the families of the victims, wishing speedy recovery for the injured.
No group has claimed responsibility for the attacks, which officials said were carried out by at least seven suicide bombers on three churches and four hotels. About 500 people were also wounded.
Daesh's claim, issued on its AMAQ news agency, came shortly after Sri Lanka said two domestic militant groups, with suspected links to foreign militants, were believed to have been behind the attacks at three churches and four hotels, which wounded about 500 people.
Terrorism is a language of the cowards and those with evil mindsets. Terrorists engage in indiscriminate violence and destruction with the wrong notion that they can strangle social harmony and break the unity of peace-loving people around the world.
Video from WFBO showed a Buffalo police officer appearing to push a 75-year-old man who walked up to police clearing Niagara Square around the 8 p.m. curfew Thursday.
The UAE was able to supply the material because of its internationally-recognised success in curbing the spread of COVID-19.
Prime Minister Narendra Modi's government is dismantling its vast lockdown of the 1.3 billion population imposed in March.