As night falls in Sri Lanka, we are pausing our live coverage of the deadly Easter Sunday bombings. Here's what we know:
US President Donald Trump called Sri Lanka's Prime Minister Ranil Wickremesinghe this morning to express condolences.
Mr Wickremesinghe reportedly appreciated the president's concern and updated him on the progress of the investigation into the attacks.
Mr Trump also pledged US support to Sri Lanka in bringing the perpetrators to justice, and the leaders reaffirmed their commitment to the fight against global terrorism.
The BBC's Anbarasan Ethirajan writes from the capital, Colombo:
Sri Lankans are yet to come to terms with this wave of unprecedented bomb attacks.
It is believed some Muslim youths were radicalised after clashes between the majority Sinhala Buddhists and Muslims last year in the central district of Kandy.
There have been videos on social media showing hardline Islamists and Sinhala hardliners promoting hatred after that violence.
But very few expected such massive attacks a year later. And why were Christians targeted? They are also a minority in Sri Lanka.
The country experienced suicide attacks by Tamil Tiger rebels during the civil war that ended in 2009.
But the ruthlessness with which the latest attacks were carried out show that the country's task this time will be challenging.
It is a different kind of battle. In the meantime, Sri Lankan Muslims are left nervous and afraid.
A British man has confirmed that his wife and two children, aged 14 and 11, were killed in the attacks.
"My family and I wish to confirm that my wife Anita, our son Alex (age 14) and our daughter Annabel (age 11) were killed in the bombing of the restaurant of the Shangri-la Hotel, Colombo on Sunday morning while sitting at our table," Ben Nicholson said in a statement.
"Mercifully, all three of them died instantly and with no pain or suffering."
Mr Nicholson added that he was "deeply distressed at the loss of my wife and children."
He described Anita as a "wonderful, perfect loving and inspirational mother" and his two children as "amazing, intelligent, talented and thoughtful".
"We would ask that the media now respect our privacy and allow us to grieve together," the statement said.
According to a social media profile, lawyer Anita Nicholson was based in Singapore, working as a managing counsel at mining and metals company Anglo American at the time of her death.
The Duke and Duchess of Cambridge, Prince William and Catherine, have shared a message for the people of Sri Lanka.
"We have been deeply saddened to learn of the devastating attacks in Sri Lanka this Easter Sunday.
"Senseless acts like these in places that people would expect to be at their safest are truly horrifying.
"Our hearts go out to the families and friends of those who have lost their lives, to the Christian community, and to the people of Sri Lanka at this tragic time. You are all in our thoughts and prayers."
Three of the four children of Danish billionaire Anders Holch Povlsen died in the attacks, a spokesman has told the BBC.
The family were visiting Sri Lanka over the Easter holiday. The names of the children have not been made public.
Mr Holch Povlsen owns the international clothing chain Bestseller.
He is also the biggest single shareholder in clothing giant Asos and is the UK's largest private landowner, according to the Times newspaper.
More information has emerged about the number of Indian nationals killed in the attacks.
The death toll has increased from seven to eight. All of the victims were from the southern state of Karnataka, the Indian embassy in Sri Lanka says.
St Anthony's Church, the site of one of Sunday's most deadly attacks, is more than just a place of worship, writes the BBC's Ayeshea Perera from the scene in Colombo:
For the first time in its 175-year history, people are being turned away.
Near its entrance, half hidden by a wall, you can see bits of rubble and shards of glass. The clock on its left tower is frozen at 8.45 - the time the blast took place.
Among those gathered outside the church is Prabath Buddhika. Although Mr Buddhika is Buddhist by religion, like many others, he is a strong believer in the power of St Anthony.
Mr Buddhika ran to the church after hearing the explosions. The carnage he saw there could not be described, he says, but people fearlessly came forward from around the area in order to help.
Interpol - the International Criminal Police Organisation - says it is sending an Incident Response Team (IRT) to assist with crime scene investigation, the examination of explosives, counter-terrorism and victim identification.
"If required, additional expertise in digital forensics, biometrics, as well as photo and video analysis will also be added to the team on the ground" the organisation said.
"The families and friends of the victims of these bombings, as with every terrorist attack, require and deserve the full support of the global law enforcement community," Interpol secretary general Jürgen Stock added.
US Secretary of State Mike Pompeo has said America will continue fighting "radical Islamic terror", which he said remained a threat following the attacks in Sri Lanka.
"Sadly, this evil exists in the world," he told reporters on Monday. "This is America's fight, too."
Mr Pompeo said that he had spoken to Sri Lanka's Prime Minister Ranil Wickremesinghe over the telephone.
He earlier tweeted to condemn the "brutal" attacks, adding that the US offered its "deepest condolences".
A previously unknown group called the National Thowheed Jamath (NTJ) is being accused of having carried out the attacks - even though no group has yet admitted the carnage.
The NTJ is believed to have splintered off from another hardline Islamist group in the country, the Sri Lanka Thowheed Jamath (SLTJ).
So who are they? You can read more about the group here.
The UK's High Commissioner to Sri Lanka, James Dauris, has described the attacks as "tragic and traumatic" and said he's spoken with Britons in hospital "who have been affected by today's senseless attacks".
"We have tremendous sympathy and are sorrowful for their loss. We are extending all the support to all those who are here and back in the UK," he told the BBC.
"Our appeal is for people to get in touch with their families back home, look at our travel advisory on how to travel safely.
"We are worried about the potential consequences of yesterday’s attack on the harmony that has been built over years. It’s not impossible that other attacks might happen."
Earlier on Monday, officials confirmed that eight British citizens had been killed in the attacks.
More on the explosion today near a church in the capital, Colombo, where scores were killed during Easter services on Sunday.
The blast occurred in a van near St Anthony's Shrine. Bomb disposal experts had been trying to defuse explosives inside the vehicle, which had been used by the attackers.
A witness told Reuters news agency: "The van exploded when the bomb defusing unit of the STF (Special Task Force) and air force tried to defuse the bomb."
It is not clear if anybody was injured during the small explosion.
Sri Lanka was rocked by a wave of deadly bombings on Easter Sunday that targeted churches and high-end hotels. Here's the latest:
The US State Department has issued revised travel advice, urging greater caution for those visiting Sri Lanka.
"Terrorist groups continue plotting possible attacks in Sri Lanka," the department says, adding: "Terrorists may attack with little or no warning, targeting tourist locations... airports, and other public areas."
Other governments, including Japan and Australia, have also cautioned citizens planning travel to Sri Lanka.
Japan's Prime Minister Shinzo Abe has joined leaders from around the world in sending his condolences to victims of the attacks.
One Japanese national was among those killed in the Easter Sunday bombings.
"I would like to offer my prayers for the victims of the attacks, as well as my heartfelt condolences to the families of the deceased and my sympathies to the wounded," he said in a statement.
"Such an act of terrorism cannot be justified, and Japan firmly condemns it. Japan is firmly committed to combating terrorism in co-operation with Sri Lanka and the international community."
People have gathered at a morgue in Colombo to identify loved ones who were killed in the Easter Sunday bomb attacks.