Two 18-year-old students were arrested for unauthorized computer access and fraud in connection with an alleged grade-changing scandal at San Dimas High School, authorities announced Thursday.
Detectives with the Los Angeles County Sheriff's Department's Fraud and Cyber Crimes Bureau were investigating a breach of security involving the school's computer system and its website.
Several students told KTLA that the hacking involved students who were changing grades in exchange for cash.
District officials would only confirm that "a few students gained unauthorized access to secure information."
The website has been temporarily shut down.
It could take weeks or even months to determine the full extent of the breach, according to detectives.