Muslims in New Zealand were killed and British Muslims feel the anger of bigots. They did not explain how he got the wound but a knife was located in the vehicle.
A suspected white supremacist has been charged with one count of murder over the shootings, and will next appear in court on April 5.
Ardern said the cabinet agreed on Monday a royal commission of inquiry "will look at what could have or should have been done to prevent the attack".
She also ordered the royal commision to produce a "comprehensive" report.
That is not to say there are not pockets of ideology that are counter to our values - that we as a nation utterly reject - but we would be naive to think we're the only country in the world that didn't have pockets of that, ' she said.
Liz Howley, the Harrisonburg leader for Moms Demand Action for Gun Sense in America, said she was thinking about the difference between here and New Zealand.
"It's hard to look at the numbers and see that in 2017, more school age children were killed by firearms than active duty police officers or military personnel", said Howley. "New Zealand is not a surveillance state ... but questions need to be answered".
Canadians on cruise ship that was stranded off Norway; one injured
Founder and chairman of Viking Cruises, Norwegian billionaire Torstein Hagen , met some of those who had been airlifted. The Viking Sky lost power on Saturday amid rough seas and sent out a mayday signal as it drifted towards rocks.
There were fears that Beijing had postponed the trip amid strained relations after New Zealand's intelligence agency last November halted plans for Chinese-owned Huawei to participate in a proposed 5G network, citing "significant security risks".
His father, Syed Ayaz Ahmed, family members and government officials received his body at the airport.
Meanwhile, the Indian High Commission in Wellington said on Monday the bodies of two victims had arrived in their homeland and a third was expected later in the day.
Tell MAMA, a British organization that monitors Islamophobic incidents, revealed that almost all cases that have been recorded comprised of "language, symbols or actions" linked to the Christchurch terrorist attacks.
The two repatriated Indian victims are a 23-year-old master's student and a 24-year-old commercial pilot.
Ansi Alibava, 25, was the first of at least five Indians shot dead on March 15 to be repatriated.