A goods train carriage is blocking train tracks north of Waikanae after derailing this afternoon.
The incident happened at 1.30pm, KiwiRail spokesman Nigel Parry told NZPA.
The cause of the derailment was not clear and KiwiRail would investigate what had happened.
The train was still blocking the track and would possibly affect rail services planned for this evening but replacement coach services would be provided if necessary, he said.
The goods carriage stayed upright but caused some issues with traffic when it scattered gravel across the adjacent road, a police spokesman said.