Two armed guards brought Brenton Tarrant into court. A raft of further charges are expected.
He did not speak, but was looking around particularly at the media present.
At least 49 people were killed during Friday prayers at two mosques in Christchurch, New Zealand. Four people have been arrested - three men and one woman - according to reports, and police have recovered firearms from both the Linwood Avenue and Al Noor Mosque shooting scenes.
Tarrant, who grew up in the New South Wales town of Grafton, had been living in the southern city of Dunedin, about 360km south of Christchurch. Police have warned the public that sharing the video is an offence and social media companies have said they are trying to scrub it from their platforms.
Residents pay their respects by placing flowers for the victims of the mosques attacks in Christchurch on March 16, 2019.
The suspect who claimed responsibility for the shootings left a 74-page anti-immigrant manifesto in which he explained who he was and his reasoning for the attack. After fighting with a neighbor and killing him and his daughter, a 33-year old man started "indiscriminately shooting at anything that moved".
TRT World's Jacob Brown explains. A Turkish offcial said Ankara had also opened an inquiry after it emerged the man had made several visits to Turkey.
She said the suspect meant to continue the rampage before he was caught by police.
Prime Minister Jacinda Ardern has called the shooting an "unprecendented attack of violence".
"From what we know, it does appear to have been well planned".
49 morts dans des attaques terroristes visant deux mosquées — Nouvelle-Zélande
Dans ce document confus de 74 pages, intitulé " Le Grand remplacement ", le tireur déclare vouloir s'en prendre à des musulmans. Les forces de l'ordre avaient imposé un bouclage du centre-ville avant de lever les mesures quelques heures plus tard.
He compared it to a shooting at a synagogue in Pittsburgh that killed 11 people last October, deadly attacks on churches in Egypt by Islamic State and an attack by a far-right Israeli gunman on a West Bank mosque in 1994 that killed 29 people.
Australian Prime Minister Scott Morrison said an Australian national arrested after the attack was an "extremist, right-wing violent terrorist".
People gather at a vigil in New York City to mourn for the Christchurch victims. That number has grown consistently throughout the years, with New Zealand reporting only 1.3 million such firms in 2016, 1.2 million in 2009 and less than a million in 2005.
He also livestreamed to the world in graphic detail his assault on the worshippers at Christchurch's Al Noor Mosque. Bangladesh Cricket Board spokesman Jalal Yunus said most of the team had gone to a mosque near Hagley Park by bus and were about to go inside when the incident took place.
A witness described the sound of gunfire breaking out just as the prayer leader began his sermon at a mosque. Indian officials have not said whether the nine were believed to be living in Christchurch.
"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.
The Nabi family immigrated to New Zealand from Afghanistan in the 1980s to flee the Soviet Union's invasion, Omar told the network. In 2011, the temblor in Christchurch killed 185 people.
"He used to tell us life was good in New Zealand and its people are good and welcoming", said Elyan's brother, Muath.