None of the four people arrested were on New Zealand's security and terrorism watchlist.
Two other armed suspects were taken into custody while police tried to determine what role, if any, they played in the cold-blooded attack that stunned New Zealand, a country so peaceful that police officers rarely carry guns.
Before Friday's attack, New Zealand's deadliest shooting in modern history took place in 1990 in the small town of Aramoana, where a gunman killed 13 people following a dispute with a neighbor.
Video and documents circulating online - but not officially confirmed - suggested the shooter had streamed his attack on Facebook Live.
Brenton Tarrant posted a 73-page manifesto on twitter before he started to kill people, he described them as a terrorist attack.
An anonymous post on Friday on the discussion site 8chan, known for a wide range of content including hate speech, said the writer was going to "carry out an attack against the invaders", and included links to a Facebook live stream, in which the Friday shooting appeared, and a manifesto.
Satellite navigational audio could also be heard in the video as the gunman drove to the mosque, which AFP tracked on Google StreetView showing his route for the two kilometres (1.2 miles) leading there.
"This is one of New Zealand's darkest days", Adern said.
One eye witness said that the gunman entered from the main entrance of the building and began shooting.
Four suspects are in custody after the shootings
Forty-nine people are dead and dozens are wounded after shootings at two mosques in New Zealand.
The gunman at one mosque was an Australian-born citizen, Australian Prime Minister Scott Morrison said in Sydney, describing him as "an extremist, right-wing, violent terrorist".
New Zealand is also generally considered to be welcoming to migrants and refugees.
He describes himself as "a private and mostly introverted person" and admits he is racist, adding that he is an "Eco-fascist by nature".
"I saw dead people everywhere".
Bush clarified that police had found two improvised explosive devices in one auto. The man burst into the mosque as worshippers were kneeling for prayers. After walking back outside and shooting a woman there, he gets back in his auto, where the song "Fire" by English rock band "The Crazy World of Arthur Brown" can be heard blasting from the speakers.
Home to almost 400,000 people, Christchurch is the largest city on New Zealand's South Island. The singer bellows, "I am the god of hellfire!" and the gunman drives away.
The massacres took place from 1.40pm this afternoon at the Masjid Al Noor and Linwood Masjid mosques. "It must have been an automatic - no one could pull a trigger that quick", the man, who did not wish to be named, told AFP. In a statement he said: "Our hearts go out to the people of New Zealand following the news of this bad act in Christchurch". The CACR found that Muslims immigrants are viewed "less favourably" by New Zealanders. He said he was not a member of any organization, but had donated to and interacted with many nationalist groups, though he acted alone and no group ordered the attack. Sometimes called the garden city, it has been rebuilding since an quake in 2011 killed 185 people and destroyed many downtown buildings.
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Armed police were deployed at several locations in all cities, unusual in a country where levels of gun violence are low . Another person who was earlier arrested was said to be a member of the public carrying a firearm who was trying to help.
Federal prosecutors had referred to Cali in court filings in recent years as the underboss of the Gambino organization. Frank Cali, 53, was shot multiple times and then run over by a pickup truck, according to the New York Daily News .
A Downing Street spokeswoman said: "She has been working tirelessly to make a deal and she will continue to do that". May has said she will hold another vote next week on her deal, although lawmakers have already rejected it twice.
YouTuber PewDiePie has responded to reports that a gunman involved in the New Zealand shootings made a reference to his name. He claimed to represent Europeans and whites in a battle against immigrants, people he repeatedly described as "invaders".
Senior Leen Dweik began pointing her finger in Clinton's face and angrily accusing her rhetoric of inspiring the mass shooter. Students confronted Clinton, who is pregnant with her third child, over statements she'd made denouncing anti-Semitism.
A 2010 second-rounder, Tate started his career with the Seattle Seahawks before three and a half seasons with the Lions. One potential conflict? Tate played about 75 percent of his snaps in the slot over the last two seasons.
Pietrycha says the heavy rain which has aggravated flooding conditions in northwest Missouri and northeast Kansas has ended. The weather service recorded a 60 miles per hour (97 kph) wind gust at Indianapolis International Airport.
That's all Hello Games is spilling for the moment, but it plans to reveal more details when it knows it can be precise. Murray promised that "these changes are an answer to how we have seen people playing since the release of Next".
John Bolton harshly condemned the ICC in one of his first speeches after becoming Trump's national security advisor in September. He threatened additional steps, including economic sanctions, against the ICC if the court does not change its course.
However, Army barricades blocked marchers. "Thankfully we had the people in this town who were very supportive of the families". What followed was a 12-year-long investigation involving more than 900 witnesses and hundreds of hours of evidence.
At about the same time, there was a second shooting at Masjid mosque in Linwood, where seven more were killed. After parking, he took two guns and walked a short distance to the mosque where he opened fire.
Meates said at a news conference at the Christchurch hospital that it's "hard to fathom the enormity of this act of terrorism". Muslims account for just over 1 percent of New Zealand's population, a 2013 census showed, most of whom were born overseas.
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He didn't play again until the Australian Open , where he fell in the championship match to Novak Djokovic . However, Federer and Nadal got to this appointment in a completely different state.
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Another man said he saw children being shot. "Just deeply, deeply saddened that this would happen in New Zealand ". White said the events in Christchurch will now be a game-changer for all sports teams visiting the country.
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That will allow you to see settings such as internet connectivity, NFC, and audio volume without leaving the app you're in. Instead of scanning files, it sets 10 millisecond time delay on each file to impersonate file scan functionality.