The shooter also released a 74-page manifesto, titled "The Great Replacement", online before the shooting. Police have not identified the suspects.
Asked how Trump responded, Ardern said: "He acknowledged that and agreed". One of those injured is a five-year-old girl. "All Canadians join New Zealanders and Muslim communities around the world in grieving".
The prime minister said early on Saturday that she had received "messages of condolence from around the world" and worldwide leaders including Donald Trump, the USA president, who has been criticised for his hostility towards Muslims.
"People started to pass by us with blood stains on their clothes, they were very scared and their voices were trembling, some people could not even speak", restaurant manager Prakash Sapkota, who was near the mosques, told Euronews.
Political and Islamic leaders across Asia and the Middle East voiced concern over the targeting of Muslims.
Trudeau said Canada "remembers too well the sorrow" felt following an attack on a mosque in Quebec. Scheer said he was only there to support the energy workers, not the "other elements that tried to associate themselves with the event".
Facebook said it had deleted the gunman's accounts "shortly after the livestream commenced" after being alerted by police.
The majority of the victims were gunned down at the Al Noor Mosque, while the rest were shot dead at another mosque in suburban Linwood.
"But as we condemn the horrific terrorist act in New Zealand, we also must commit ourselves to fighting hatred wherever we find it", Nenshi said.
It said Conservatives stand with Muslims around the world to "reaffirm our commitment to building a world where every people, of every faith, can live in freedom and peace together".
Among those inside the mosque in downtown Christchurch were members of Bangladesh's national cricket team, according to a Bangladeshi journalist, Mohammad Isam. Genuis initially rejected calls to follow suit, calling it a talk on human rights, and accused Sgro on social media of retreating only after she remembered this is an election year. Another showed a pair of figures, one in a headscarf, embracing.