The driver is described as a skinny male of European descent with red hair, aged mid-20s to 30, with some form of facial hair.
The passenger is a male Maori or Pacific Islander, aged 40 to 50, fat or solidly built, with longer dark hair.
Both were wearing blue overalls with some kind of red tubing or piping down the side, said Mr Jackson.
The vehicle is described as an older model white van with tinted rear windows and without hub caps.
"Both boys are shaken. They ran off when they got concerned about the situation."
Mr Jackson said police are concerned about the men's behaviour and would like the public's assistance to resolve this.
- Members of the public can contact Mr Jackson on his direct line (06) 370 0306 or contact Crimestoppers on 0800 555 111.