A person has been seriously injured in a workplace incident, involving a digger, in Auckland.

Police and emergency crews were called to Scott Rd, in Hobsonville, about 7.55am.

A spokesman for New Zealand Fire and Emergency said they helped to extricate a person who had been injured by a digger.

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Exactly what has happened and how the person has been injured were not yet clear, he said. Police are also only describing it as an "incident" at this stage.

A police spokeswoman said: "A person has been seriously injured [and] the Westpac Helicopter is responding."

St John said it sent out one ambulance vehicle and a rapid response unit to the scene.

A spokeswoman confirmed one person was treated with serious injuries. They were eventually airlifted to Auckland City Hospital in a serious condition.