Nine people have been injured in a two car crash - with children among the hurt.

Two adults were critically injured in the crash at the intersection of SH1 and SH83 in Pukeuri near Oamaru just before 1pm.

A police spokesperson confirmed three children travelling in one car were injured, one with moderate to serious injuries and two with minor injuries.

The driver of the car was critically injured.

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Four people travelling in the other car were also injured, one critically.

The serious crash unit are investigating and diversions are in place.