Aleast 16 people have been mowed down by a four-wheel-drive in the Australia's Melbourne on Thursday.
Emergency services are at Melbourne's Flinders Street station, where a car has reportedly hit and injured a number of pedestrians.
A spokesman for Victoria Police said police were attending an incident where a vehicle had collided with a number of pedestrians.
Meanwhile, Australian police have arrested a driver who drove into a crowd. Sky News Australia reported that a pre-school child with a head injury was taken to hospital in a serious condition.
A witness, Sue, told Melbourne radio station 3AW that she heard screams before she saw "people flying everywhere". "We could hear this noise, as we looked left, we saw this white car, it just mowed everybody down," she said. "People are flying everywhere. We heard thump, thump. People are running everywhere."