A major secondary school in Adelaide’s southeast has been forced to ramp up security after a series of threatening emails were sent to the principal.

Undercover police and other security staff have been deployed at one of Adelaide's largest schools in response to a series of threatening emails. Parents at Glenunga International High School were ...

“Concerning” emails sent to a principal has sparked an increase in security at a large Adelaide high school. Parents, families and carers with students at Glenunga International High School ...