Friday's attack, which Prime Minister Jacinda Ardern labeled as terrorism, was the worst ever peacetime mass killing in New Zealand and the country had raised its security threat level to the highest.
Christchurch residents including the Muslim community are mourning the victims of the attacks.
Brenton Harris Tarrant, 28, has been charged with one count of murder, according to a court filing.
She also sent a message to American politicians given the countless shootings claiming lives in the US, writing: "America take note!" He did not enter a plea, but made a hand gesture associated with white supremacists.
Tarrant was remanded into custody and is expected to appear in court again on April 5.
Pool via Getty Images Brenton Tarrant, charged in relation to the Christchurch massacre, is escorted in the courtroom Saturday in Christchurch, New Zealand.
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Several Members of Parliament in Norway are also alarmed and strongly oppose her imprisonment and especially any lashes. Human rights organisation Amnesty International has called the punishment "outrageous injustice".
"There have been attempts to change our laws in 2005, 2012 and after an inquiry in 2017".
Numerous victims hailed from around the world. The nationalities of the victims included Indian, Pakistani, Malaysian, Indonesian, Egyptian, Bangladeshi, Saudi, Somalian and Turkish, authorities said. Police told her that he is not among the 49 fatalities. He was shot in the abdomen and the leg.
Shah Mahmood Qureshi says authorities in Christchurch, where the shootings took place, are trying to determine whether three other Pakistanis who have been missing since Friday's attack were among the fatalities.
Yesterday she vowed to change New Zealand's gun laws, confirming the "primary perpetrator" used five weapons. "Our investigations are in their early stages and we will be looking closely to build a picture of any of the individuals involved and all of their activities prior to this horrific event", Police Commissioner Mike Bush said.
"I can tell you one thing right now, our gun laws will change", Ms Ardern said in Wellington. "It was his intention to continue his attack", the prime minister said.
"We grieve, we are shocked, we are appalled, we are outraged, and we stand here and condemn absolutely the attack that occurred today by an extremist, right-wing, violent terrorist".
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The court asked the cricket board to consider a fresh punishment for the former India pacer within the next three months. The two-judge division bench had ruled that the BCCI ban could not be overturned or reduced.
Ardern urged the public not to share the "distressing" 17-minute video.
A friend of Wasseim's, Carolyne Phillips, who was at the hospital with him, said he had undergone surgery for a perforated bowel, an injury to his pelvis and to get shrapnel and bone out of his hip socket.
A teary-eyed Ardern said she brought messages of love, support and grief on behalf of all New Zealanders to the crowd gathered at Canterbury Refugee Resettlement and Resources Centre.
None of those arrested had a criminal history or were on watchlists in New Zealand or Australia.
"I'm so proud of what they've done", he said.
When asked about whether the same person carried both shootings, Bush said officials were not aware of anything that would contradict that suggestion.
Meanwhile, outside the court, major roads in the city center are cordoned off with heavy armed police officers on duty.
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The bodies of victims are highly contagious, and the aid group said that figure shows community mistrust is still widespread. The number of new cases has halved to 25 per week since January, and the virus was now concentrated in Butembo and Katwa.