Churches in Colombo, Sri Lanka were closed after over 250 people were killed in suicide bombings on April 21.
President Maithripala Sirisena’s office cited concerns over identification and national security in the wake of the deadly bombings.
Authorities said the militants detonated three explosives and opened fire during the raid.
Hundreds gathered at mosques across Sri Lanka on Friday, despite warnings that places of worship could be targeted by militants through the weekend.
Mohamed Zahran, the leader of local militant group National Towheed Jamaat, was known for his vitriolic extremist speeches on social media.
The archbishop of Colombo and other religious leaders are cautioning Sri Lankans against attending worship services for the foreseeable future.
The country's top health official said the blasts had damaged some bodies beyond recognition, making accurate identification difficult.
Although Christians are currently a minority in Sri Lanka, Christianity has a long history in the island nation.
Officials said the death toll from Sunday's attacks had risen to 321.
In a since-deleted tweet, the president made his second major social media mix up concerning the deadly Easter attacks.
Dieter Kowalski, 40, of Denver and Kieran Shafritz de Zoysa, a fifth grader at Sidwell Friends in Washington, D.C., both died in Sunday's attacks.
Minutes later the supposedly grief-torn president tweeted he's "never been happier or more content" as he bragged about the U.S. economy.
The nationwide social media blockage came after eight blasts swept through Sri Lankan churches and hotels on Easter Sunday, killing more than 200 people.
More than 500 people were also wounded in the attacks.
This is painful to watch.
President Maithripala Sirisena imposed a state of emergency for seven days, aiming to stop the violence from spreading to other parts of the country.
“Society, people’s opinion or Bollywood celebrities should not dictate what we wear.”