Paramedics have confirmed that 15 people are being treated after a car has hit pedestrians in the Melbourne CBD.
At least six people have already been taken to hospital, including a pre-school aged child who is being treated for a head injury and is in a serious condition.
Three people have been taken to Alfred Hospital, injuries and condition unknown.
Three people have been taken to the Royal Melbourne Hospital.
The pre-school aged child has been taken to the Royal Children's Hospital.
Police have arrested the driver of the vehicle.
A witness who owns a store nearby told the ABC that the vehicle appeared to be travelling at 80 to 90km/hour.
"He appeared to be travelling at around 80 to 90 kilometres down Flinders Street," the witness said.
"The only thing that slowed him down was him hitting pedestrians."
The incident happened near a tram stop, with unconfirmed reports describing the vehicle as a white SUV.