Backhoes had stopped digging and police officers said they were setting up a media area inside the cemetery.
A New Zealand standard A-category firearm licence is issued after a police and background check.
A grandmother of the Australian man suspected of killing 50 people in two New Zealand mosques said she was "just devastated" for the dead and injured.
Facebook said it had removed 1.5 million videos of the attack around the world in the first 24 hours.
But he added that the support of other people hasn't been ruled out and is "a very, very important part of our investigation".
Facebook has revealed that it removed almost 1.5 million videos of the Christchurch mosque shootings in which 50 people were killed and another 50 people injured, after a gunman opened fire on worshippers on Friday, March 15 at two mosques in New Zealand.
Ardern also vowed to tighten New Zealand's gun laws, making it a priority for her government. Ardern also stated that she would open an inquiry into the country's intelligence services, believing the community was too focused on potential threats from Muslim sources.
Tarrant did not have a criminal history and was not on any watchlists in New Zealand or Australia. Around 1.2 million of these were blocked at upload the company said.
Morrison says religious freedom has to start with the right to worship and meet safely without fear of violence.
The suspect in the shootings, 28-year-old white supremacist Brenton Harrison Tarrant, appeared in court Saturday amid strict security, shackled and wearing all-white prison garb, and showed no emotion when the judge read him one murder charge and said more would likely follow.
All along the perimeter of Hagley Park - a lush, sprawling stretch of green in the centre of Christchurch, New Zealand - are connections to Friday's horrific mass shootings at two mosques.
Reigning Super Rugby champions Canterbury Crusaders, who play in Christchurch, said on Monday they would consider changing their name after criticism that it was historically insensitive.
The counterterrorism officials then stormed a second house at Lawrence, a bit farther north and close to Grafton, where Tarrant grew up.
Gun City owner David Tipple said the alleged gunman bought four weapons and ammunition online from the store between December 2017 and March 2018, but it did not sell him the high-powered weapon used in the massacre.
New Zealand's top online marketplace Trade Me Group said it was halting the sale of semi-automatic weapons in the wake of Friday's attack.
Greg Robertson, head of surgery at Christchurch Hospital said staff were used to seeing gunshot wounds and severe injuries, but the scale and nature of the attacks was different.
Tipple said he supported Ardern's call for gun law reforms as the Christchurch shootings had raised legitimate concerns.
An Australian man has been charged with murder in the attacks at two Christchurch mosques.
Police said they had released a preliminary list of the victims to families, which has helped give closure to some who were waiting for any news.
People across the country were still trying to come to terms with the massacre that Ardern described as "one of New Zealand's darkest days".
"Police understands the religious duty of the Islamic faith to bury the deceased as soon as possible, and is working closely with the Chief Coroner to do everything possible to expedite the process", New Zealand police said on Twitter. Is he in a fridge?