More than 1000 weapons have been intercepted at the Port of Napier in the past decade.
Figures released under the Official Information Act show there have been 52 incidences of weapon interceptions from 2003 to September 2012 at the port, totalling 1180 items.
The exact types of weapons found are unknown but could include offensive weapons, such as flick knives, knuckledusters and concealed weapons, as well as firearms, parts of firearms and disabling sprays.
The largest number intercepted was last year, when five incidents yielded 721 items.
Customs said the most common reasons for intercepting and detaining items were a failure to declare, an incorrect declaration or false/incorrect documents, prohibited or restricted items and an attempt to evade duty.