A police officer who crashed into three parked vehicles in an unmarked police car suffered a medical event.
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No one was injured in the crash on Cranford St in Papanui on Friday morning, said a police spokeswoman.
She said the crash happened after the officer suffered a medical event.
"The driver involved is OK and is being supported by police while undertaking further medical testing. They are currently on desk-based duties while undertaking those further medical checks.
"The incident will be investigated as per normal procedures," she said.