Wellington's Johnsonville Line will remain closed for the remainder of the week after a passenger train derailed near Khandallah Station on Saturday, injuring six.
The southbound train was diverted onto a dead-end track and crashed into a concrete stop block, with investigators working to determine the cause.
Buckled seats and extensive damage were visible inside a Wellington train carriage after it crashed.
Metlink said bus replacements had been extended until the end of Sunday due to the incident.
"Bus replacement services run every 30 minutes. Some services may be busy, so we encourage you to go early to also help familiarise with your bus replacement stops."
Trains would run as normal from Monday.
The TAIC is appealing for witnesses after a Metlink train derailed on the Johnsonville Line on Saturday, injuring six people and leaving the line closed indefinitely. (Source: 1News)
TAIC chief accidents investigator Louise Cook said it was too early to determine the cause of the crash.
"We're examining all relevant factors," she said, adding that investigators would look at the people involved, the systems, train data, and CCTV footage."
Cook appealed for witnesses to come forward.
"Getting information is vital, so we're keen to hear as soon as possible from people who were on the train or who saw the accident occur. We're especially interested in receiving photos or videos."
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