They are being assessed in the emergency department, but all are stable, she said.
A police officer at the scene said their injuries were minor.
The driver of a blue Ford Falcon stationwagon accused the driver of a Daihatsu Sirion hatchback of causing the smash.
"She pulled out in front of us," he said at the scene as three tow-trucks removed the damaged cars in front of a large watching crowd.
"She wasn't looking. She should've used her driving skills a bit better and looked where she was going."
He said he wasn't injured.
The area, beside the city's Botanic Gardens, is busy today with tourists, joggers, and children on school holidays.
Police are directing traffic past the scene and carrying out investigations.
