Tarrant has been described as a suspected white supremacist, based on his social media activity. The camera attached to his head recording the massacre follows the barrel of his weapon, like some macabre video game.
He appeared in court a day after the shootings at the Masjid Al Noor and Linwood Masjid mosques. 49 people have been confirmed dead and more than 20 are injured following attacks at two mosques. No images have emerged from the second mosque.
Australian police said the family of the suspect is helping their investigation.
A Met Police spokesman told Daily Star Online: "It was reported that three males got out of a blue Ford Fiesta and attacked another man with a weapon - believed to be a hammer or other blunt object".
According to the National Terrorism Threat Advisory System, this would mean authorities have received "credible intelligence that indicates that individuals or groups continue to possess the intent and capability to conduct a terrorist attack in Australia".
He said Muslims at a Levenshulme mosque "beamed" when they saw his act. "There were elderly people sitting there praying and he just started shooting at them". Two other people were in custody and police said they were seeking to understand whether they were involved in any way.
"This isn't about cricket", New Zealand Cricket chief executive David White said when discussing the cancellations in his sport. After the visit, Ardern travelled to a hospital at which 39 people are being treated from injuries. One person died later in a hospital. Facebook, Twitter and YouTube all said they had taken steps to remove copies of the videos. "Hi guys how are you".
Mr Nabi said his father, who ran the Afghan Association, was killed as he tried to save another person from the gunman.
Tarrant's occupation was not given on the charging document, and his address was provided as a place in Dunedin, more than 300 km south of Christchurch in New Zealand's South Island. Ardern said some were from Pakistan, Turkey, Saudi Arabia, Bangladesh, Indonesia and Malaysia. Muslims account for just over 1 percent of New Zealand's population. "I'm not sure how to deal with this". Nabi's family left Kabul, Afghanistan, for New Zealand in the 1970s.
"This is not the New Zealand that has welcomed them and that it is not a reflection of the New Zealand they know, and that sentiment came through very strongly".
Four New Zealand women hugged each other outside the cordon.
Armed police were deployed at several locations in all cities, unusual in a country where levels of gun violence are low.
An Aberdeen man who fled for his life after chaos erupted all around him in the wake of the New Zealand terrorist attack said he fell into a "complete panic" soon after the shooting began. The AR-15 was used at Port Arthur, as well as a number of high-profile mass shootings in the United States.
"While work is being done as to the chain of events that lead to both the holding of this gun license and the possession of these weapons, I can tell you one thing right now - our gun laws will change", Ardern told reporters on Saturday.
Political and Islamic leaders across Asia expressed their disgust at the deadly shooting.