A freight train became stuck in the Kaimai Tunnel this morning, prompting a police call out.
The train got stuck just inside the Hemopo end of the tunnel just before 11am and the driver onboard was able to walk out.
A police spokeswoman said mechanics were called to clear the train.
A KiwiRail spokesman said a freight train travelling north through the tunnel suffered a fault which resulted in the train losing air pressure and locking the brakes on.
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"The driver, who was the sole crew member, has secured the train and walked out of the tunnel."
He said another train would recover the train shortly.