Australian Brenton Tarrant, 28, has been charged with one count of murder over the slayings and a judge said on Saturday that it was reasonable to assume more charges would follow.
"If that hadn't happened, many more would have died and I wouldn't be here now", he said.
It was later revealed his son was also a victim of the terror attack.
No time for the release of the bodies for burial had been agreed, but Alabi said it would "probably" start from Sunday.
Alabi said the community leaders had requested the process be done as quickly as possible.
He said the attacker ran back to the auto for a second time to grab another rifle. Aziz, 48, is being hailed as a hero for preventing more deaths during Friday prayers at the Linwood mosque in Christchurch.
Under New Zealand's contempt rules, there are limits on what can be published about the suspect, to preserve his right to a fair trial.
Aziz, originally from Afghanistan, said he picked up one of the gunman's discarded weapons and threatened the man, who drove off.
Aziz, 48, is being hailed as a hero for preventing more deaths during Friday prayers at the Linwood mosque in Christchurch after leading the gunman in a cat-and-mouse chase before scaring him into speeding away in his auto.
"Those two police officers acted with absolute courage", Bush said.
Church services for victims of the attack were held around the country, including at Christchurch's "Cardboard Cathedral", a temporary structure built after much of the central city was destroyed in a 2011 natural disaster. One person died in hospital.More news: Cyclone Idai hits Zimbabwe, at least 24 people dead
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Fifty people were killed on Friday and dozens more injured. "It's just comprehending what is the incomprehensible". The gunman had already killed dozens at the Al Noor mosque nearby, and on the streets. One woman carried sandwiches and falafel.
Anwar hid in a bathroom and tried to call emergency services as shots rang out, telling stuff.co.nz he heard the gunman say an expletive about Muslims and "We're going to kill you today".
"He was studying to be a pilot and we saw him for morning classes".
He went back to his auto to reload, then returned to the mosque to kill more people. "He went after him, and he managed to overpower him, and that's how we were saved", Alabi said.
"He sat in his auto and with the shotgun in my hands, I threw it through his window like an arrow". Pakistan's High Commission in Wellington earlier confirmed that four Pakistani men were wounded and five others missing.
He said he heard people begging for their lives. Two men faced charges unrelated or "tangential" to the attack, while a woman had been released, he said.
Our prayers and condolences are with the country, stay strong New Zealand!
In a manifesto circulating online, Tarrant described himself as "Just a ordinary White man, 28 years old" who used the spoils of cryptocurrency trading to finance extensive travels through Europe from 2016-2018.
As New Zealanders struggled to cope with the deadly mayhem in Christchurch, stories of heroism have emerged from the tragedy, including a worshiper who chased away the gunman armed only with a credit card machine.
The children were saying "please come inside", he said, adding: "I told them "you guys go inside, I will be alright".
New Zealand has in the past tried to tighten firearm laws, but a strong gun lobby and culture of hunting has stymied such efforts.