The U.S. stands by New Zealand for anything we can do.
"Inevitably, this is such a small community, so these people are going to be people who are familiar to us, even if we don't know them directly", he says.
Two mosques were targeted in the attack.
Ardern's chief press secretary Andrew Campbell told CNN that the email in a "generic" email account maintained by staff, and was not seen by the Prime Minister.
Kai Schwoerer via Getty ImagesNew Zealand Prime Minister Jacinda Ardern speaks to the media on Saturday.
A spokesman said the email did not describe the specific incident and that there was "nothing in the content or timing that would have been able to prevent the attack".
Bush paid tribute to police officers who responded to the scene and who had the grim task of assisting the wounded and detaining the gunman.More news: World reacts with sadness and anger to New Zealand mosque attacks
Showing hallmarks of John Howard's leadership after Port Arthur, the Christchurch shootings will be a key chapter in Ms Ardern's political career.
Two other people have been apprehended and are being questioned about what role, if any, they had in the attacks. He had no criminal history in New Zealand or Australia and had not drawn the attention of the intelligence community for extremist views.
Tarrant is 28 and was arraigned Saturday on the first of many expected murder charges.
The London Ambulance Service were also called but the 27-year-old victim was driven directly to an east London hospital by friends. He's accused of a shooting rampage Friday at two mosques in Christchurch that injured 48 people in addition to the dozens killed.
"Hi guys how are you".
"It's a fine line between telling the children this is the reality of it", he said, "and not exposing them to the true nature of humanity that can lead to this sort of thing".
Dozens of people laid flowers at cordons near both mosques in Christchurch, which is still rebuilding after an natural disaster in 2011 killed nearly 200 people.
The manifesto also said he chose to make his attack in New Zealand to show that nowhere in the world was safe.More news: HEXO Pays about $260 Million to Acquire Newstrike Brands
Two people from Malaysia and Saudi Arabia were wounded, the countries' embassies confirmed and at least three Turkish citizens were wounded, president Recep Tayyip Erdogan said.
New Zealand is not a Utopia, there are occasional reports of racism and anti-immigrant attitudes, but they attract headlines because they are not the norm.
The two-year-old boy was reported to be in stable condition, as was the 13-year-old.
The tragic attack saw 41 people killed at the Masjid Al Noor mosque in central Christchurch, whilst seven others were killed at the suburban Linwood Masjid Mosque, and one person died later at Christchurch Hospital.
"She came here for the peace.now she is shocked", he said, adding his mother was too afraid to leave her house.
"I can tell you right now, our gun laws will change", Ardern said.
It is customary in Islam to bury the dead within the 24 hours.More news: Love Island's Michael Thalassitis has died, aged 26
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