'Credible threat' prompts closure of Mater Dei High School in Santa Ana until June 3

SANTA ANA, Calif. (KABC) -- Mater Dei High School in Santa Ana will be closed through the end of the week due to what's being called a "credible threat."

School officials learned about the threat Tuesday, but did not reveal what it was.

"We acknowledge the alarming nature of this message; however, we at Mater Dei take all threats made to the school seriously," said the school in a statement.

Santa Ana police responded, and safety and sweep protocols were implemented.

Detectives are still investigating, but the Mater Dei campus and campus activities are canceled through Friday.