The Transport Accident Investigation Commission (TAIC) has launched an inquiry after a passenger train derailed at Auckland's Britomart Station on Wednesday.
Over 100 people were reportedly on the train, which was coming into the station from Manukau at about 9:45am. Three carriages of the six-carriage train came off the tracks.
"The Commission is sending a team of two investigators to the site, due to arrive early this afternoon," a TAIC spokesperson says.
"The Commission opens an inquiry when it believes the circumstances of an accident or incident have - or are likely to have - significant implications for transport safety, or when the inquiry may allow the Commission to make findings or recommendations to improve transport safety."
Auckland Transport spokesperson Mark Hannan says the train was upright and no one is injured.
"Thirty-three passengers on-board are being transferred on to replacement bus services," he says.
"Customers are advised to use alternative bus travel where possible."
He says the station is closed while crews work to isolate the train.