A credible threat has compelled the administration at Mater Dei High School in Santa Ana to close their campus this week through Friday.

The closure will occur during the last week of campus instruction and one week before finals. Department chairs are developing online education options while the campus is closed.

Mater Dei administrators notified the SAPD about the threat after learning about it on Tuesday. A letter was then sent to parents and students by school President Michael Brennan and Principal Frances Clare.

The letter noted that “safety and sweep protocols were implemented,” and also stated that “we acknowledge the alarming nature of this message; however, we at Mater Dei take all threats made to the school seriously.”

The decision to close the school was made in concert with the Roman Catholic Diocese of Orange, which runs the school. The campus will remain closed and all activities will be canceled through Friday as the SAPD conducts their investigation.