The alleged killer is Australian Brenton Tarrant who published a manifesto hours before the shooting in which he said his inspiration is Norwegian terrorist Andres Breivik and that he sees Muslim immigrants as "invaders".
Although shops were shuttered and many made a decision to stay at home, Christchurch residents piled bouquets of flowers at a makeshift memorial near the Al Noor mosque, many accompanied with handwritten letters laden with sadness and disbelief. He was likely to face further charges, police said.
The attack has prompted an outpouring of grief and deep shock in this usually peaceful and hospitable country, which prides itself on welcoming refugees fleeing violence or persecution. The man burst into the mosque as worshippers were kneeling for prayers.
Gray's speculation was backed up by a rambling, hate-filled, manifesto Tarrant posted to social media ahead of the Christchurch killings.
"NSW Police force will continue to do everything possible to ensure the safety and security of all members of the community and everyone should continue to go about their business without fear", he said. "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.
"While work has been done as to the chain of events that led to both the holding of this gun licence and the possession of these weapons, I can tell you one thing right now: our gun laws will change", Ardern told reporters.
The suspect, who is an Australian citizen, was living in the southern city of Dunedin, about 225 miles from Christchurch, at the time of the attack, Ardern said.
In a statement released by the Clarence House Instagram page, Prince Charles has shared his horror on what is the darkest day in New Zealand's history.
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A five-year-old girl was critically wounded and had surgery but remained in serious condition, her uncle, Sabri al-Daraghmeh, told Jordan's al-Mamlaka TV.
Hungry for any news, families and friends of the victims gathered at the city's Hagley College, near the hospital. But updates were slow to come, and many families were still waiting to hear whether their loved ones were among the victims.
A Saudi man, Mohsin Al-Mozaini was among the dead, AlArabiya reported.
He said up to 70 people were praying inside Linwood when gunshots were heard.
In contrast, President Donald Trump has repeatedly told mourning Americans in the wake of shootings that stricter gun control would make the country more unsafe, not less.
Facebook said it had deleted the gunman's accounts "shortly after the livestream commenced" after being alerted by police. "Many of the people require multiple trips to the theatre to deal with the complex series of injuries they have", said Christchurch Hospital's Chief of Surgery Greg Robertson.
Ardern also said it was believed the weapons used in the attack had been modified and that loopholes that allow such modifications would be closed in proposed gun reforms to be discussed by cabinet on Monday.
Christchurch is a city of about 400,000 residents, still recovering from a massive quake in 2011 that killed 187 people. It's a city in crisis mode yet again, just a few years on from the quakes that rattled Christchurch to its core.
The Metropolitan Police are trying to establish a motive for the incident in east London but witnesses reportedly claim the men shouted "Islamophobic" comments.
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He split time with the Lions and Eagles in 2018 and finished with 74 receptions for 795 yards and four touchdowns. And the high-volume pass-catcher is now a member of Big Blue after inking a deal with the New York Giants .