New Zealand is a mourning after 49 people were killed at two mosques in the country's deadliest-ever shooting.
PM Jacinda Ardern described Friday's shooting in the city of Christchurch as one of New Zealand's "darkest days."
Flowers have been left outside mosques across the country as worried families wait for news of missing loved ones.
A gunman believed to be a white supremacist live-streamed the rampage. A man in his late 20s has been arrested and is due to appear in court.
Two other people are in custody. No names have been made public.
A total of 48 people were wounded in the shootings. The identities of the dead and wounded have not been released.
Bangladesh, India and Indonesia all say that their citizens were killed in the shooting and others were unaccounted for.
On Saturday, Christchurch Mayor Lianne Dalziel expressed "revulsion" at this of terrorism "and solidarity with the victims.
" We have welcomed new people to our city. They are our friends, they are our neighbors, "she told reporters. "We want to get together to support them."
Security remains tight across Christchurch. All mosques in New Zealand have been closed.
How events unfolded
The first report of an attack came from the Al Mosque in central Christchurch during Friday prayers at 1
A gunman drove to the front, entered and fired on worshippers for about five minutes.
The gunman, who live-streamed the attack from a head-mounted camera, said he was a 28-year-old Australian called Brenton Tarrant. A survivor told the New Zealand Herald newspaper how he escaped through a window
Moroccan-born Nour Tavis said he was in the front row when the shooting started.
"People were running and all of a sudden you saw them fall," he said. "I followed… it was the best place to get out."
The wife of one of his friends was killed, he said.
"When she heard the noise, she wanted to go and make sure her husband was safe, "he said." He got the bullet, her husband got away. "
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The gunman is then said to have driven about 5km (three miles) to another mosque in the suburb of Linwood where the second shooting occurred
One witness described how one of the hippers had managed to disarm the man, who Media playback is unsupported on your device
It is not clear where the arrests were made.
The visiting Bangladesh national cricket team had a narrow escape: they were on their way to pray at Al Noor mosque.
Police say they recovered from both mosques, and explosive devices were found in one of the suspects
According to the latest census figures, Muslims make up about 1.1% or New Zealand's population or 4.25 million.
Numbers rose sharply as New Zealand took in refugees from various war torn countries since the 1990s.
The main suspect
Social media accounts in the name of Brenton Tarrant were used to post a lengthy, racist document in which the author identified the mosques that were later attacked.
The man says he started planning and attack after visiting Europe in 2017 and being angered by events there.
The document is called "The Great Replacement" – a phrase that originated in France and has become a rallying cry for European anti-immigration extremists.
Although New Zealand police said they had a man in his late 20s with murder, they did not identify him.
"It is clear that this can now be described as a terrorist attack, "Prime Minister Ardern customs reporters.
In a tweet, she said:" What has happened in Christchurch is an extraordinary act or unprecedented violence. It has no place in New Zealand. Many of those affected will be members of our migrant communities. – New Zealand is their home – they are us. "US President Donald Trump offered his" warmest sympathy and best wishes "to New Zealand. "The US stands by New Zealand for anything we can do. God bless all!" he wrote
UK Prime Minister Theresa May offered here "deepest condolences to the people of New Zealand".
The Queen said she was "deeply saddened by the appalling events in Christchurch today. Prince Philip and I send our condolences Pope Francis offered his "heartfelt solidarity" and was "deeply saddened to learn of the injury and loss of life caused by the senseless acts of violence", Vatican Secretary of State Pietro Parolin said in a telegram.
German Chancellor Angela Merkel said she was "with New Zealanders who were attacked and murdered out of racist hatred while peacefully praying in their mosques".
And French President Emmanuel Macron called it "odious attack" and said France stood "against any form of extremism."
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