MURRIETA (AP) — Two 15-year-old boys have been arrested for making online threats against a Southern California high school.

Police in Murrieta in Riverside County said in a statement Friday that the kids were arrested Wednesday and booked for conspiracy to commit murder.

The FBI and Temecula authorities contacted Murrieta detectives last week to say someone had made serious threats on the internet against a school campus, possible in their city.

The detectives discovered the threats were against students at Vista Murrieta High School.

It’s unclear whether the suspects attended the school. The teens’ names were not released because they are minors.

The District Attorney’s office is reviewing the case.

Murrieta is a desert city of about 100,000 people 65 miles north of San Diego.