Three people were arrested in connection with the shootings.
He appeared in court a day after the shootings at the Masjid Al Noor and Linwood Masjid mosques. No images have emerged from the second mosque.
As well as speaking with the families of the dead, the Prime Minister spoke to survivors from the attack.
Ms Ardern spoke with victims of the sickening terror attack.
"I'm extremely proud of what they've done today". "There were elderly people sitting there praying and he just started shooting at them".
New Zealand is normally peaceful and calm - and has plenty of guns.
Police have long anxious that the gaps and loopholes make it easier for the wrong people to obtain and keep firearms.
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.
Desperate for any news, families and friends of the victims gathered at the city's Hagley College, near the hospital.
Grafton residents who knew Tarrant as a resident have told 9News they remember him as a "relatively normal" person who worked at a local gym.
New Zealand Prime Minister Jacinda Ardern meets with members of the Muslim community in the wake of the mass shooting at the two Christchurch mosques.
The victim can not be named by order of the court.
"Hi guys how are you".
"It brings actually a feeling of fear that we hope we can actually overcome and try to avoid by spreading more awareness, by educating our community and the larger community that these things shouldn't be an obstacle in front of us to enjoy the freedom of religion", said Wahb.
From time to time people outside the cordon came to place flowers under a tree to express their condolences to the victims.
There are people who I would describe as having extremist views that have absolutely no place in New Zealand and in fact have no place in the world. Ardern said some were from Pakistan, Turkey, Saudi Arabia, Bangladesh, Indonesia and Malaysia.
"I'm not sure how to deal with this".
The distraught man was spoken to by a crowd of people outside the police cordon before he crossed the street, his face full of dismay.
Mr Nabi said his father, who ran the Afghan Association, was killed as he tried to save another person from the gunman.
"She came here for the peace.now she is shocked", he said, adding his mother was too afraid to leave her house.
The Metropolitan Police are trying to establish a motive for the incident in east London but witnesses reportedly claim the men shouted "Islamophobic" comments.
For an Islamic funeral burial is traditionally within 24 hours of death. The shooter, who had a gun license acquired in November 2017, carried out the killings with two semi-automatic weapons, two shotguns and a lever-action firearm, Ardern said.
"The individual charged was in custody 36 minutes from receiving the first call", she said.
Under the law, for instance, some semiautomatic rifles-commonly known as assault weapons-have to be registered as military-style semiautomatic rifles (MSSAs).
Police Association President Chris Cahill backed tighter gun laws, saying the weapons used in the mosque shootings were banned in Australia after the Port Arthur massacre in 1996 in which 35 people were gunned down. "Are there associates in the United States?" "It's a awful, frightful thing", Trump said. Police told her that he is not among the 49 fatalities. "1.3 billion Muslims have collectively been blamed for any act of terror".