Six in hospital after Vic chemical spill

Six people have been taken to hospital and 1000 students evacuated after a chemical spill at a Melbourne school.

A fault in the ventilation system of a science room at Lyndale Secondary College prompted the school to move everyone to the gym, the Country Fire Authority says.

The incident involved a potassium iodide mixture in the classroom, which was secured and contained by CFA crews.

A dozen people were treated by paramedics and Ambulance Victoria says six were taken to hospital in stable conditions.