One person was left trapped with serious injuries following a crash on the Southern Motorway this afternoon.
Police said the crash is believed to involve two cars and happened in the Southbound Lanes between the Ellerslie - Penrose and Mount Wellington Interchanges at about 3pm.
Traffic is building rapidly and drivers are asked to avoid the area if possible and to be patient if caught in the congestion.
The Police Serious Crash unit will be investigating the incident.
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