A Sri Lankan soldier stands guard at the damaged St. Anthony's Church or Shrine in Colombo, Sri Lanka, Friday, April 26, 2019. Priests have allowed journalists inside St. Anthony's Church in Sri Lanka for the first time since it was targeted in a series of Islamic State-claimed suicide bombings that killed over 250 people. Broken glass littered the sanctuary's damaged pews and blood stained the floor. Shoes left by panicked worshippers remained in the darkened church, and broken bottles of holy water lay on the floor. (AP Photo/Manish Swarup)

COLOMBO, Sri Lanka (AP) — Catholic leaders canceled Sunday Masses indefinitely across Sri Lanka and officials urged Muslims to stay home for Friday prayers in an extraordinary call by the clergy to curtail worship as fear of more attacks plagued the island nation after the deadly suicide bombings on Easter.

Shops were closed, streets were empty and heavy security patrols continued across the country despite police saying the alleged mastermind of the attacks that killed over 250 people had died in one of the suicide blasts.

Those Sri Lankans who did venture out spoke about the fear encompassing daily life at a level unseen since a long civil war ended a decade ago. Many are angry that the government, paralyzed by internal disputes, hadn't acted on intelligence obtained weeks before Easter that warned of the attacks.

On Friday night, Sri Lanka's military said its soldiers in the eastern part of the country engaged in a gunbattle with suspects believed to be linked to the attacks, and police announced a 24-hour curfew until further notice in the Muslim-dominated area where the shooting took place.

Continuing government confusion in its investigation — from drastically lowering the death toll to misidentifying a Brown University student as a militant — only added to the public's worries.

"Everyone is nervous," said Abdullah Mohammed, a 48-year-old Muslim in Colombo. "Not just the Muslims. Buddhists, Christians, Hindus — everybody's nervous."

Officials from the police to the prime minister say militants remain on the loose and have access to explosives. That has led to increased security at shrines, churches, temples and mosques across the multiethnic country of 21 million off the southern coast of India.

Cardinal Malcolm Ranjith told journalists that church officials had seen a leaked security document describing Roman Catholic churches and other denominations as a major target. Ranjith, who is the archbishop of Colombo, asked the faithful across Sri Lanka to stay home for their own safety.

"We don't want repetitions," Ranjith said.

It was an extraordinary request for a Catholic clergyman to make, as churches often remain a refuge. It came on the day that priests allowed journalists inside one of the bombed churches, St. Anthony's Shrine in Colombo, where broken glass littered a blood-stained floor. Giovanni Maria Vian, a church historian and emeritus editor of the Vatican newspaper, said he believed it was the first time the church had canceled Masses across a country for security reasons.

The U.S. Embassy in Sri Lanka also warned the public to stay away from places of worship over the weekend, a stark alert underlining that authorities believe that attackers remain at large.

Authorities told Muslims to worship at home rather than attend communal Friday prayers that are the most important religious service of the week, but several mosques held services anyway. At a mosque in Colombo, police armed with Kalashnikov assault rifles stood guard outside for hundreds of worshippers as the imam inside and others wept while praying to Allah to help their country.

The Easter attackers are "not Muslims. This is not Islam. This is an animal," said Akurana Muhandramlage Jamaldeen Mohamed Jayfer, the chairman of the mosque. "We don't have a word (strong enough) to curse them."

Sri Lanka's government, crippled from a long political crisis between the president and prime minister last year, promised swift action to capture militants still at large. President Maithripala Sirisena said about 140 people had been identified as having links to the Islamic State group.

A "major search operation has been undertaken," Sirisena said. "Every household in the country will be checked."

On Friday night, soldiers raiding a house in Sri Lanka's Eastern Province fought a gunbattle with suspected militants linked to the bombings, said military spokesman Brig. Sumith Atapattu. After a couple of hours, he said soldiers were "engaged in a clearing operation," adding that some casualties were possible.

In the same area, police spokesman Ruwan Gunasekara said officers acting on information from intelligence officials found 150 sticks of blasting gelatin and 100,000 small metal balls, as well as a van and clothing suspected to be used by those involved in the Easter attack. Suicide bomb vests often are packed with such balls to increase the shrapnel in the explosion, making them even deadlier.

Earlier Friday, police confirmed the militant group's leader, Mohamed Zahran, died in the suicide bombing at the Shangri-La Hotel, one of six hotels and churches attacked. Zahran appeared in an Islamic State video claiming responsibility for the coordinated assault, and authorities in both Sri Lanka and Australia confirmed links between IS and the attack.

Police said investigators had determined that the assailants' military training was provided by someone they called "Army Mohideen," and that weapons training had taken place overseas and at locations in Sri Lanka's Eastern Province.

Police said they arrested the operator of a copper factory who had helped Mohideen make improvised explosive devices and purchase empty cartridges sold by the Sri Lankan military as scrap copper.

On Thursday night, Sri Lanka's Health Ministry drastically reduced its estimated death toll from the bombings. A statement said "approximately" 253 people had been killed, nearly one-third lower than an earlier police estimate of 359 dead.

The discrepancy was not immediately explained, but it fit a pattern of confused reports by Sri Lankan officials that have muddled the investigation. On Friday, police apologized to a Brown University student and a human rights activist after they posted her picture to Twitter and erroneously identified her as a wanted militant. The police then deleted their Twitter account.

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Associated Press writers Krishan Francis in Colombo and Rod McGuirk in Canberra, Australia, contributed to this report.

A Sri Lankan catholic priest stands near broken glass in front St. Anthony's Church in Colombo, Sri Lanka, Friday, April 26, 2019. Priests have allowed journalists inside St. Anthony's Church in Sri Lanka for the first time since it was targeted in a series of Islamic State-claimed suicide bombings that killed over 250 people. Broken glass littered the sanctuary's damaged pews and blood stained the floor. Shoes left by panicked worshippers remained in the darkened church, and broken bottles of holy water lay on the floor. (AP Photo/Manish Swarup)
In this Thursday, April 25, 2019 photo, sunlight steams in from gaping holes, as a surveyor works at St. Sebastian's Church, where a suicide bomber blew himself up on Easter Sunday in Negombo, north of Colombo, Sri Lanka. Nearly a week later, the smell of death is everywhere, though the bodies are long gone. Yet somehow, there’s a beauty to St. Sebastian’s, a neighborhood church in a Catholic enclave north of Sri Lanka’s capital. You can see the beauty in the broken stained-glass windows. It’s there in the little statues that refused to fall over, and despite the swarms of police and soldiers who seem to be everywhere now in the streets of the seaside town of Negombo. (AP Photo/Manish Swarup)
A Sri Lankan Army soldier stands guard in front St. Anthony's Church in Colombo, Sri Lanka, Friday, April 26, 2019. Priests have allowed journalists inside St. Anthony's Church in Sri Lanka for the first time since it was targeted in a series of Islamic State-claimed suicide bombings that killed over 250 people. Broken glass littered the sanctuary's damaged pews and blood stained the floor. Shoes left by panicked worshippers remained in the darkened church, and broken bottles of holy water lay on the floor. (AP Photo/Manish Swarup)
The archbishop of Colombo Cardinal Malcolm Ranjith addresses a press conference in Colombo, Sri Lanka, Friday, April 26, 2019. The archbishop said that there will be no Sunday Masses until further notice after the Easter bombings in Sri Lanka. (AP Photo/Manish Swarup)
In this Thursday, April 25, 2019 photo, a statue of St. Jude stands on a wall speckled with fragments of shrapnel at St. Sebastian's Church in Negombo, north of Colombo, Sri Lanka. Nearly a week later, the smell of death is everywhere, though the bodies are long gone. Yet somehow, there’s a beauty to St. Sebastian’s, a neighborhood church in a Catholic enclave north of Sri Lanka’s capital, where a man calmly walked in during Easter services with a heavy backpack and blew himself up. It’s there in the little statues that refused to fall over, and despite the swarms of police and soldiers who seem to be everywhere now in the streets of the seaside town of Negombo. (AP Photo/Manish Swarup)
In this Thursday, April 25, 2019 photo, Catholic priests walk outside St. Sebastian's Church, where a suicide bomber blew himself up on Easter Sunday in Negombo, north of Colombo, Sri Lanka. Nearly a week later, the smell of death is everywhere, though the bodies are long gone. From inside, you see destruction wherever you look. But from outside the church, if you ignore the police tape and if you’re standing far enough away, you might think nothing had happened there at all. (AP Photo/Manish Swarup)
A Muslim volunteer assigned to spot unfamiliar visitors looks at a man ahead of Friday prayers in Colombo, Sri Lanka, Friday, April 26, 2019. Religious leaders cancelled large public gatherings amid warnings of more attacks, along with retaliatory sectarian violence in Sri Lanka though some still held communal Friday prayers at mosques. (AP Photo/Gemunu Amarasinghe)
Sri Lankan Muslims leave after offering Friday prayers in Colombo, Sri Lanka, Friday, April 26, 2019. Across Colombo, there was a visible increase of security as authorities warned of another attack and pursued suspects that could have access to explosives. Authorities had told Muslims to pray at home rather than attend communal Friday prayers that are the most important religious service for the faithful. At one mosque in Colombo where prayers were still held, police armed with Kalashnikov assault rifles stood guard outside. (AP Photo/Manish Swarup)
Muslim men arrive as others pray at a mosque in Colombo, Sri Lanka, Friday, April 26, 2019. Religious leaders cancelled large public gatherings amid warnings of more attacks, along with retaliatory sectarian violence in Sri Lanka though some still held communal Friday prayers at mosques. (AP Photo/Gemunu Amarasinghe)
Muslim men leave a mosque after Friday prayers in Colombo, Sri Lanka, Friday, April 26, 2019. Religious leaders cancelled large public gatherings amid warnings of more attacks, along with retaliatory sectarian violence in Sri Lanka though some still held communal Friday prayers at mosques. (AP Photo/Gemunu Amarasinghe)
Muslim men gather outside a mosque in Colombo, Sri Lanka, Friday, April 26, 2019. Sri Lanka’s president has appealed to the island nation not to view its minority Muslim community as terrorists in the wake of Easter Sunday attacks that officials say were carried out by a local Muslim extremist group.. (AP Photo/Gemunu Amarasinghe)
A Muslim woman walks outside a Mosque in Colombo, Sri Lanka, Friday, April 26, 2019. Religious leaders cancelled large public gatherings amid warnings of more attacks, along with retaliatory sectarian violence in Sri Lanka though some still planned to hold communal Friday prayers at mosques. (AP Photo/Gemunu Amarasinghe)
A Muslim man points to prayer timings inside a mosque in Colombo, Sri Lanka, Friday, April 26, 2019. Religious leaders cancelled large public gatherings amid warnings of more attacks, along with retaliatory sectarian violence in Sri Lanka though some still planned to hold communal Friday prayers at mosques. (AP Photo/Gemunu Amarasinghe)
Sri Lankan policeman patrol in a Muslim neighborhood before Friday prayers in Colombo, Sri Lanka, Friday, April 26, 2019. Across Colombo, there was a visible increase of security as authorities warned of another attack and pursued suspects that could have access to explosives. Authorities had told Muslims to pray at home rather than attend communal Friday prayers that are the most important religious service for the faithful. At one mosque in Colombo where prayers were still held, police armed with Kalashnikov assault rifles stood guard outside. (AP Photo/Manish Swarup)
Shoes and other belongings left by panicked worshippers are seen stacked up inside St. Anthony's Church in Colombo, Sri Lanka, Friday, April 26, 2019. Priests have allowed journalists inside St. Anthony's Church in Sri Lanka for the first time since it was targeted in a series of Islamic State-claimed suicide bombings that killed over 250 people. Broken glass littered the sanctuary's damaged pews and blood stained the floor. Shoes left by panicked worshippers remained in the darkened church, and broken bottles of holy water lay on the floor. (AP Photo/Manish Swarup)