Emergency services are currently responding to a chemical HAZMAT incident at a public swimming pool in Picton.
Seven paramedics crews have been called to the scene at Argyle Street in Picton, following reports that people had been overcome by fumes and suffering breathing difficulties.
Nine children have been assessed by NSW Ambulance, as well as two adults.
Four of these people have been taken to hospital, with one of them a child in a serious condition.
More to come.