An Auckland gun store is working with police as they investigate where and how the Christchurch mosque gunman obtained his deadly weapons.
Police have questioned staff at Reloaders Supplies in Onehunga, which has been selling guns and ammunition for 35 years, Stuff reported.
The gunman killed 50 people when he opened fire at two Christchurch mosques last Friday. More than 250 detectives and specialist staff are now investigating the killings, along with Australian police and the FBI.
A 28-year-old man is in custody facing one charge of murder but is expected to face more charges when he reappears next month.
Police recovered five weapons after his arrest. They included two semi-automatic weapons, two shotguns, and a lever-action firearm.