Three teenagers have been identified as those involved in a train surfing incident in Upper Hutt on March 8.
Constable Sarah Ferguson of Hutt Valley Tactical Crime Unit said the three teens had been referred to Youth Aid for follow-up.
"Hutt Valley Police take such extreme recklessness in personal safety very seriously, and are committed in working with KiwiRail and the community to prevent similar situations," she said.
"The very nature of railways means that a lapse in judgement, or simply caving into peer pressure, can have severe consequences and the Railways Act 2005 has clear guidelines regarding the required behaviour from individuals."
Two males were seen holding onto the rear of a train outside Manor Park in Upper Hutt, and were filmed by a witness in a car.