A 17-year-old boy has been arrested after allegedly making 74 hoax bomb threats to various educational facilities across Victoria, NSW and South Australia.
The teen was arrested in Victoria for allegedly making the threats between May 2016 and April this year.
An investigation by Victoria Police's e-crime squad detectives, NSW Police's fraud and cybercrime squad, and detectives from South Australia's electronic crime section let to the teenager's arrest.
The teen's electronic devices were seized during his arrest.
The boy was charged with nine counts of making a bomb hoax in Victoria, 13 counts of using a carriage service to make a hoax threat in NSW and 49 counts of the same charge in South Australia.
The boy appeared in court on Thursday afternoon and was bailed until June 26.
