He did not request bail and was taken into custody until his next court appearance which is scheduled for April 5.
Judge Paul Kellar said although Tarrant was facing only one murder charge, it was "reasonable to assume there will be other charges".
He live-streamed footage of himself going room-to-room, victim to victim, shooting the wounded from close range as they struggled to crawl away in the main Christchurch mosque.
Bush said it took 36 minutes from the first attack to the suspect's arrest. No images have emerged from there.
She was yet to meet the officers, but had asked after them while meeting with police bosses in Christchurch today and requested that they pass on the "thanks of all New Zealanders".
"The offender was mobile, there were two other firearms in the vehicle that the offender was in, and it absolutely was his intention to continue with his attack", Ardern told reporters in Christchurch on Saturday.
British security sources said there were no apparent United Kingdom links to the attack. None of them had been on any security watch lists prior to the attack, officials said. - AP Mourners paying their respects at a makeshift memorial near the Masjid Al Noor mosque in Christchurch, New Zealand, Saturday, March 16, 2019.
A gunman opened fire on worshippers in two mosques in Christchurch, killing 49 people.
He had no criminal history in New Zealand or Australia, and had not drawn the attention of the intelligence community for extremist views.
Bush said there were also 50 people injured.
"Many of those injured will need multiple returns to surgery".
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"Hi guys how are you".
Members of the public lay flowers and condolences at the entrance to the Christchurch Botanic Gardens on Saturday.
New Zealand's Minister for Pacific Peoples Aupito William Sio said he spoke to one of the Trustees of the Festival last night about the decision, and why it was made. The nationalities of the victims included Indian, Pakistani, Malaysian, Indonesian, Egyptian, Bangladeshi, Saudi, Somalian and Turkish, authorities said.
The Fijian rugby team also expressed their solidarity with the people of New Zealand after the attacks.
"I'm not sure how to deal with this".
One of the victims, Afghan-born Haji Daoud Nabi, sought asylum in New Zealand in 1977.
Alsati reportedly moved to New Zealand from Jordan in 2014.
"The people of Christchurch, we're used to rallying", Iannou said, referencing the 2011 quake that killed more than 180 people. "That work is already underway", she said.
It is customary in Islam to bury the dead within the 24 hours. Five guns were used by the primary perpetrator, including two semi-automatic weapons, and two shotguns, she added.
New Zealand has previously tried to change its gun laws, with the most recent attempt coming two years ago.
Armed police were deployed at several locations in all cities, unusual in a country where levels of gun violence are low.
Ardern said at her press conference that she wasn't ready to support a similar program just yet. Residents were mandated to turn in their semi-automatic rifles and other now-outlawed weapons.
But subsequent efforts to tighten the laws, including a ban on semi-automatic weapons, have stalled in parliament. "My message was sympathy and love for all Muslim communities", she said she told him.
Pence also affirmed USA cooperation in ensuring all the perpetrators were brought to justice. In fact, for many, New Zealand was a choice, a place they actively came to and committed themselves to, the place they were raising their families, where they were part of communities they loved and who loved them.