New Zealand's largest gun show cancelled after 'senseless' Christchurch attack

New Zealand's largest gun show has been cancelled following the Christchurch terror attack.

Auckland's Kumeu Militaria Show is an annual event aimed at "promoting an interest in our military history".

It was due to be held on Saturday, but in the aftermath of the shootings which killed 50 people, the family day has been called off.

"In respect for the victims of the Christchurch terror attacks and because the elevated security risks we have decided to not hold the event," the organisers posted to Facebook.

"We regret the inconvenience caused to all involved with the running of the show, the military vehicle owners, memorabilia collectors and exhibitors, defence force members, community groups, vendors, and support organisations."

The event has previously included firearms dealers and traders, and displays from the NZ Antique and Historical Arms Association and the International Military Arms Society.

In a written statement, event organiser Danny Paton told Newshub that the show was cancelled as a mark of respect.

"As the organisers of the Kumeu Militaria Show, we are appalled and horrified at the stupid, senseless Christchurch shootings," he said.

"The victims of this tragic event have our deepest condolences and our thoughts go out to all those who are suffering from it. As a mark of utmost respect to those now grieving, we have made the decision to cancel the show, which is recognised as perhaps the biggest in the country - even though thousands of people annually attend."

Vendors are asked to contact the event promoters for refunds.

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The decision has caused some controversy on Facebook, with one person arguing it means the terrorist wins.

"Every time an event is cancelled after a terrorist event, they win. They've caused the maximum amount of social disruption they could and they've already won," one person commented.

But most people said they supported the announcement.

"This shows great responsibility and genuine respect to the sad events that have happened. So unfortunate, but definitely the best thing to do given the circumstances," one person wrote.

"Really proud to see you took such a good decision. Hat off to you for putting your money where heart and soul is," another said.