A man in a long black trenchcoat and carrying what looked like a samurai sword forced a school into lockdown and sent armed police to the University of Waikato in Hamilton yesterday.
Sixteen police were sent to the university to scour the grounds after reports of an armed man about 9.30am.
It took 90 minutes to find him.
He turned out to be a 25-year-old member of the university's sword fighting club, who was in fact carrying an umbrella that looked like a weapon.
"The sword is actually an umbrella that, when a button is pushed, activates," Senior Sergeant Rupert Friend said. "The man was quite shocked at the response his activities had generated and most apologetic. We are currently working to identify the supplier of these devices and others which include an imitation shotgun."