Napier residents are in shock after a knife was pulled at a children's park.
A post on social media showed a man on a bike grasping a knife in his fist.
"This whacked out fool thought it would be cool to try [to] take one of the miniature trains at Anderson Park, instantly derailing it," wrote the man who posted the photo.
"He then pulled a knife on the old fullas that work there."
One of the men who had a knife pulled on him - who has asked to remain anonymous - volunteers at the park and told Newshub it all happened "reasonably quickly".
"I saw the two kids get onto a couple of the model trains and drive them off, while the rest of the crew were having a bite for lunch.
"I raised the alarm and we all came out and I tried to hold the main offender and take a photograph of him, but that didn't quite come to fruition."
It was after he let him go that a knife which "looked awfully huge" was pulled out.
"There was a bit of swishing back and forth, and then he ran off."
Police confirmed they attended an incident at Anderson Park at around 1:30pm on Sunday.
"A youth is reported to have presented a knife before fleeing from the area," a spokesperson told Newshub.
Police are looking into the incident and enquiries are on-going.
The worker says the person who had the knife "obviously needs help".
"He's certainly no brave man or brave guy, he's a coward."
Comments on the social media post expressed fury at the man's actions.
"You lowlife mongrel," wrote one person.
"Hasn't got the brains he was born with, stupid," said another.