There is an increased police presence on the campus on Wednesday, but the principal says investigators have not yet found any evidence to legitimize that threat.
Graffiti threatens to blow up Irvine school
IRVINE, Calif. Police said a student found the graffiti in a text book on Monday and alerted a teacher. The principal says words like, "We'll blow this place up," and "Everyone will die" were scrawled in the book, along with Wednesday's date.