Officials in New Zealand have not yet released the names of those killed or wounded, but Prime Minister Jacinda Ardern said on Friday that many of those "directly affected by this shooting may be migrants to New Zealand" or even refugees.
For nearly three days forensics teams, many flown in from across New Zealand, have been working through multiple crime scenes - at the Al Noor and Linwood mosques as well as a house in Dunedin, the southeastern city where the suspected gunman, Brenton Tarrant, lived.
After Tarrant left, the judge said that while "there is one charge of murder brought at the moment, it is reasonable to assume that there will be others".
While known for having more moderate politics, New Zealand has relatively lax gun laws in comparison with its larger neighbour.
Two other people were in custody and police said they were seeking to understand whether they were involved in any way.
Moreover, the person charged with murder had not been "on the radar" of the intelligence community for extremism, the prime minister explained.
Asked why the perpetrator would not have been on a terrorism watch list, Barton said, "there are so many people posting the sort of thing that Brenton Tarrant was posting, that they just don't raise any alarms".
She said options and the appropriate timing for national commemorative services were under consideration and would be announced in the days to come.
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Her stance was welcomed by New Zealand Police Commissioner Mike Bush.
He liked non-Muslim fighters who fought against the Muslims.
Unlike the USA, the right to own a firearm is not enshrined in New Zealand's constitution.
According to a recent report from the Anti-Defamation League (ADL), domestic extremists killed 50 people in the United States previous year - an overwhelming majority of which were perpetrated by right-wing extremists.
Leaders around the world expressed sorrow and disgust at the attacks, with some deploring the demonisation of Muslims.
About 200,000 Indian and Indian-origin people live in New Zealand.
Mohammad Imran Khan, a 47-year-old man who owned two restaurants in Christchurch died in the Lynwood mosque.
U.S. President Donald Trump, who condemned the attack as a "horrible massacre", was praised in the accused gunman's manifesto as "a symbol of renewed white identity and common purpose". "Why not release those who have been identified?" he said.
Dr Faisal, in a Twitter post, had said that Rashid and his son would be buried in Christchurch for which arrangements had been made with the assistance of Muslim and Pakistani associations in the city.
Expressing India's solidarity with the people of New Zealand, Prime Minister Narendra Modi has said hatred and violence have no place in diverse and democratic societies. "We are filled with grief over this senseless act of hate".