Three people have died and twelve others are being treated for injuries after a chemical incident on a farm north of Herold's Bay, near George in South Africa's Western Cape, according to local emergency reporting on Wednesday.

Firefighters from the Garden Route District Municipality assisted the George Municipality with efforts to contain the incident on Tuesday afternoon. The twelve injured people were taken for treatment, and the scene was handed over for further investigation.

Authorities have not yet publicly detailed what chemical was involved or how the exposure occurred. Incidents of this kind are typically investigated by police and occupational safety officials to establish whether workplace safety rules were followed.

OTMedia will update this story as officials release more information about the cause of the incident and the condition of those in hospital.