Threats of violence are rattling Southern California campuses, days after the Virginia Tech shooting rampage that killed 33 people.
Federal agents say they've detained a suspect who delivered a bogus message to San Diego State University threatening to carry out a massacre today similar to the Virginia attack.
Investigators determined the threat to be a hoax.
Meanwhile, graffiti at a Murrieta high school threatened that bombs were planted on the campus.
The spray-painted message at Vista Murrieta High School said everyone at the school would die on April 20th, the eighth anniversary of the Columbine High School shootings in Colorado.
Police, school staff and bomb-sniffing dogs swept the campus but found no bombs.
Campus threats forced lockdowns and evacuations at universities, high schools and middle schools in at least eleven states since Monday's attack.
