At a press conference that was held hours after the mass shootings at two mosques that have now claimed 49 lives, Ardern sombrely stated that this is "one of New Zealand's darkest days", and said it is "clear that this can now only be described as a terrorist attack".
Bush said that a male in his late 20s has been charged with murder and will appear at the Christchurch court Saturday morning local time.
The attacks in Christchurch, in which 40 people were killed, were reportedly live streamed on several social media sites by the shooter and have since been used in broadcasts and shared on social media.
In 2010 and 2011 the city suffered a series of devastating earthquakes, with the most destructive at 6.3 magnitude, which killed almost 200 people and destroyed thousands of buildings.
"Just heard news of the devastating reports from Christchurch, New Zealand".
In a 74-page manifesto, believed to have been written by Tarrant, he describes anti-immigrant motives, saying the victims were a "large group of invaders" who he says "seek to occupy my peoples lands and ethnically replace my own people (sic)".
Police in New Zealand have urged all mosques across the country to shut their doors in the wake of the incident.
When asked why they weren't on any lists, Ardern said: "It's an indication they had not acted in a way that warranted it". Gray also said she recalled that Tarrant's father Rodney died from some kind of asbestos-related illness when Tarrant was finishing high school. The mosques were packed with worshippers gathered for Friday prayers.
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Jacinda Ardern the Prime Minister of New Zealand announced that 49 people were killed and 20 people are severely injured from the terror attacks.
The police commissioner warned anybody who was thinking of going to a mosque anywhere in New Zealand on Friday to stay put.
"I saw dead people everywhere".
Bush said police had found two improvised explosive devices in one auto, a clarification from an earlier statement that there were devices in multiple vehicles.
Australian Prime Minister Scott Morrison on Friday confirmed the attacker at the Masjid al Noor mosque was an Australian. 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. It is the second most-populous city in New Zealand behind Auckland and Wellington. Ardern, whose party campaigned on a promise to take in more refugees, called it "the right thing to do".
The Bangladesh cricket team - which had been in Christchurch for a test match against New Zealand that was later cancelled - all escaped without injury.
The shootings took place at two separate mosques in the Canterbury region of the city. There will be so many people affected.
"We have undoubtedly experienced an attack today that is unprecedented, unlike anything that we have experienced before".