A series of bomb blasts struck churches and luxury hotels across Sri Lanka early on Sunday. The coordinated attacks killed at least 250 people, according to a revised death toll on Thursday.

The first wave of bombings struck at the heart of the country's minority Christian community during busy Easter services at churches in the cities of Colombo, Negombo and Batticaloa.

Prime Minister Ranil Wickremesinghe said Tuesday that there are "still people on the run with explosives."

Sri Lankan security forces stood on high alert, as mass funerals continued for victims on Wednesday.

A woman who lost her husband and two children during the bombing at St. Sebastian's Church in Negombo yells toward the grave site during a mass burial on Wednesday.
A woman who lost her husband and two children during the bombing at St. Sebastian's Church in Negombo yells toward the grave site during a mass burial on Wednesday.
Thomas Peter/REUTERS
Military personnel talk with a police officer near the site where a package, believed to be a bomb, was detonated in a controlled explosion after being discovered in a nearby restaurant in Negombo on Wednesday, April 24.
Military personnel talk with a police officer near the site where a package, believed to be a bomb, was detonated in a controlled explosion after being discovered in a nearby restaurant in Negombo on Wednesday, April 24.
Carl Court/Getty Images
Members of a security task force search for explosives ahead of victims' mass burials in Negombo on Wednesday.
Members of a security task force search for explosives ahead of victims' mass burials in Negombo on Wednesday.
Gemunu Amarasinghe/AP
On Tuesday, April 23, Harshani Sriyani weeps over the body of her daughter who was killed in the Easter Sunday bombings in Colombo.
On Tuesday, April 23, Harshani Sriyani weeps over the body of her daughter who was killed in the Easter Sunday bombings in Colombo.
Eranga Jayawardena/AP
Funeral ribbons hang across a road leading to St. Anthony's Shrine on April 23.
Funeral ribbons hang across a road leading to St. Anthony's Shrine on April 23.
Carl Court/Getty Images
A man is supported as he follows a coffin during a mass funeral for bombing victims at St. Sebastian Church in Negombo, Sri Lanka, on Tuesday, April 23.
A man is supported as he follows a coffin during a mass funeral for bombing victims at St. Sebastian Church in Negombo, Sri Lanka, on Tuesday, April 23.
Carl Court/Getty Images
A soldier stands guard next to members of the clergy during a mass funeral in Negombo on Tuesday.
A soldier stands guard next to members of the clergy during a mass funeral in Negombo on Tuesday.
Carl Court/Getty Images
Coffins are carried to a grave during the mass funeral at St. Sebastian Church on April 23.
Coffins are carried to a grave during the mass funeral at St. Sebastian Church on April 23.
Carl Court/Getty Images
A woman carrying an infant runs for safety after police found a suspicious vehicle parked in Colombo, Sri Lanka, on Monday, April 22, a day after several coordinated bombings across the country killed hundreds.
A woman carrying an infant runs for safety after police found a suspicious vehicle parked in Colombo, Sri Lanka, on Monday, April 22, a day after several coordinated bombings across the country killed hundreds.
Eranga Jayawardena/AP
Sri Lankan security forces stand at the site near St. Anthony's shrine in Colombo after they performed a controlled detonation of a suspicious van on Monday.
Sri Lankan security forces stand at the site near St. Anthony's shrine in Colombo after they performed a controlled detonation of a suspicious van on Monday.
Eranga Jayawardena/AP
Smoke rises from the area where a van exploded on Monday near St. Anthony's shrine in Colombo.
Smoke rises from the area where a van exploded on Monday near St. Anthony's shrine in Colombo.
Eranga Jayawardena/AP
Security personnel stand guard outside St. Anthony's Shrine on Monday, a day after the church was hit in a series of bomb blasts targeting churches and luxury hotels in Sri Lanka.
Security personnel stand guard outside St. Anthony's Shrine on Monday, a day after the church was hit in a series of bomb blasts targeting churches and luxury hotels in Sri Lanka.
Mohd Rasfan/AFP/Getty Images
Relatives weep near the coffin of 12-year-old victim Sneha Savindi, who was killed in the Easter Sunday bombing at St. Sebastian's Church in Negombo, Sri Lanka.
Relatives weep near the coffin of 12-year-old victim Sneha Savindi, who was killed in the Easter Sunday bombing at St. Sebastian's Church in Negombo, Sri Lanka.
Gemunu Amarasinghe/AP
Police and forensics officials inspect the interior of St. Sebastian's Church in Negombo on Monday.
Police and forensics officials inspect the interior of St. Sebastian's Church in Negombo on Monday.
Ishara S. Kodikara/AFP/Getty Images
Shoes and belongings of victims are collected as evidence at St. Sebastian's Church in Negombo on April 22.
Shoes and belongings of victims are collected as evidence at St. Sebastian's Church in Negombo on April 22.
Jewel Samad/AFP/Getty Images
A man mourns after viewing the body of a dead relative killed in the bomb explosion at St. Anthony's Church in Colombo on Sunday, April 21.
A man mourns after viewing the body of a dead relative killed in the bomb explosion at St. Anthony's Church in Colombo on Sunday, April 21.
NurPhoto via Getty Images
Blood stains are seen on a statue of Jesus Christ after a bomb blast inside a church in Negombo, on Sunday.
Blood stains are seen on a statue of Jesus Christ after a bomb blast inside a church in Negombo, on Sunday.
Stringer/Reuters
A woman is in tears after a deadly bomb blast at St. Anthony's Shrine in Sri Lanka's capital, Colombo, on Sunday.
A woman is in tears after a deadly bomb blast at St. Anthony's Shrine in Sri Lanka's capital, Colombo, on Sunday.
Dinuka Liyanawatte/Reuters
Security personnel and investigators sift through debris outside Zion Church in Batticaloa.
Security personnel and investigators sift through debris outside Zion Church in Batticaloa.
Lakruwan Wanniarachchi/AFP/Getty Images
A man holds up a blood-stained photograph as people wait to identify the bodies of their loved ones in front of St. Anthony's Church.
A man holds up a blood-stained photograph as people wait to identify the bodies of their loved ones in front of St. Anthony's Church.
Tharaka Basnayaka/Getty Images
Relatives of a victim of the attacks react at the police mortuary in Colombo.
Relatives of a victim of the attacks react at the police mortuary in Colombo.
Dinuka Liyanawatte/Reuters
Sri Lankan hospital workers and soldiers stand at the door to a morgue following a blast in a church in Batticaloa.
Sri Lankan hospital workers and soldiers stand at the door to a morgue following a blast in a church in Batticaloa.
Lakruwan Wanniarachichi/Getty Images
A Sri Lankan Air Force helicopter flies over a house suspected to be a hideout of militants following a shootout in Colombo.
A Sri Lankan Air Force helicopter flies over a house suspected to be a hideout of militants following a shootout in Colombo.
Eranga Jayawardena/AP
A view of damage near the Dehiwala zoo in Colombo.
A view of damage near the Dehiwala zoo in Colombo.
Akila Jayawardana/NurPhoto/Zuma Press
Relatives of bombing victims gather at a mortuary in Colombo.
Relatives of bombing victims gather at a mortuary in Colombo.
Dinuka Liyanawatte/Reuters
Colombo's Kingsbury Hotel was targeted by a blast.
Colombo's Kingsbury Hotel was targeted by a blast.
Ishara S. Kodikara/Getty Images
Relatives of a blast victim grieve outside a morgue in Colombo.
Relatives of a blast victim grieve outside a morgue in Colombo.
Eranga Jayawardena/AP
Sri Lankan Special Task Force personnel gesture outside a house during a raid following an explosion at a property in the Orugodawatta district of Colombo.
Sri Lankan Special Task Force personnel gesture outside a house during a raid following an explosion at a property in the Orugodawatta district of Colombo.
Ishara S. Kodikara/Getty Images
The interior of St. Sebastian's Church in Negombo, north of Colombo, shows damage from a bomb blast.
The interior of St. Sebastian's Church in Negombo, north of Colombo, shows damage from a bomb blast.
Chamila Karunarathne/AP
Sri Lankan military members stand guard outside St. Anthony's Church following an explosion.
Sri Lankan military members stand guard outside St. Anthony's Church following an explosion.
NurPhoto via Getty Images
Crime scene investigators inspect the scene of an explosion at the Shangri-La hotel in Colombo.
Crime scene investigators inspect the scene of an explosion at the Shangri-La hotel in Colombo.
Dinuka Liyanawatte/Reuters
Sri Lankan police officers clear the road as an ambulance drives through carrying injured from bomb blasts in Colombo.
Sri Lankan police officers clear the road as an ambulance drives through carrying injured from bomb blasts in Colombo.
Eranga Jayawardena/AP
A bombing victim's relative weeps outside a hospital in Batticaloa, eastern Sri Lanka.
A bombing victim's relative weeps outside a hospital in Batticaloa, eastern Sri Lanka.
Lakruwan Wanniarachchi/AFP/Getty Images
Priests view blast debris outside St. Anthony's Shrine.
Priests view blast debris outside St. Anthony's Shrine.
Tharaka Basnayaka/NurPhoto/Getty Images
Sri Lankan security personnel keep watch outside St. Anthony's Shrine.
Sri Lankan security personnel keep watch outside St. Anthony's Shrine.
Ishara S. Kodikara/AFP/Getty Images
Security forces inspect the inside of St. Anthony's Shrine after Sunday's attack.
Security forces inspect the inside of St. Anthony's Shrine after Sunday's attack.
Anadolu Agency/Anadolu/Getty Images
Sri Lankan military officers stand guard in front of St. Anthony's Shrine.
Sri Lankan military officers stand guard in front of St. Anthony's Shrine.
NurPhoto via Getty Images
A relative of a victim of an explosion at St. Anthony's Shrine reacts outside the police mortuary in Colombo.
A relative of a victim of an explosion at St. Anthony's Shrine reacts outside the police mortuary in Colombo.
Dinuka Liyanawatte/Reuters