In addition to those killed in Friday's assault, another 50 others were injured during the shooting, authorities said. Of the injured victims, 34 remain in the Christchurch hospital, including 12 in the intensive care unit.
Prime Minister Jacqueda Ardern said on Sunday that the authorities have begun returning the identified organs to the families, and all organs will be returned by Wednesday.
Six disaster victim identification experts have traveled from Australia to help speed up the process, she said.
The police in New Zealand describes efforts to identify victims as a "detailed and complex job" that has to be fully completed
"It is important to have security around the cause of death for any future court proceedings," the detective supervisor said Peter Reed. ,
Chief Investigator Deborah Marshall has dealt with the difficulties faced by authorities in properly identifying the bodies of the victims of the terrorist attack on Friday.
"There can be nothing worse than passing the wrong body to the wrong family," Marshall said. "It will not happen here."
Speaking at the same press conference, Deputy Chief of Police Wally Hahumaa said the authorities are working closely with the Imams and the Federation of Islamic Associations of New Zealand.
The last 48 hours were the most terrible in the lives of these families. We understand it is an additional trauma to them that they have failed to bury their relatives quickly, according to their religious duty, "said Deputy Commissioner Wally Humegawa.
"This is an unprecedented event and the support of Muslim leaders and their community is invaluable."