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A police spokeswoman said it was called to the crash at the intersection between Timaru and Midland Sts at 4.10pm.
Traffic was affected after the crash, but still flowing.
The spokeswoman said it was not believed anyone was seriously injured in the crash.
Fire and Emergency New Zealand and St John also attended.
One woman was seen being taken into an ambulance, but was walking and did not appear to have serious injuries.