An anonymous court officer says potential jurors are often bringing banned items into the courthouse

Open Justice reports security officers have seized more than 22-thousand items at some of the country's biggest courts in the past 18 months.

Figures from Ministry of Justice data show items like knives, homemade tasers, and even a small axe are being seized.

The court officer says people attending court sometimes aren't aware of the rules - leading to them seizing up to 30 items in one morning.