A freshman at a Garden Grove high school has been arrested in connection with making bomb threats at the school, police said.
Officers were sent to Bolsa Grande High School on Tuesday afternoon about a bomb threat after a student found a note saying there was a bomb on campus, officials said.
The student brought the note to school staff and the school was locked down until officers arrived.
Once there, police went classroom to classroom evacuating the 2,075 students.
A search of the campus turned up no suspicious devices.
The next day, school staff found another note on campus talking about a weekend fire on campus and a previous bomb threat. The note also said there would be a shooting at the school.
The note prompted police to increase patrols as a precaution.
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School staff reviewed the notes and thought they recognized the writing as possibly being that of one of the students.
After talking with the student, police said they developed enough information to make an arrest for leaving both notes at the school.
A search of the student's home turned up "numerous items of evidence," police said.
Police are looking at what connection, if any, the student had to the suspicious fire on campus on Dec. 7.
Eight classrooms were damaged on the campus at 9401 Westminster Ave.
A few hundred students who attend classes in the fire-scarred wing were being accommodated in makeshift classrooms in the cafeteria, library and the gym.
The students will meet in those areas until winter break. When students return to school in January, they will use portable classrooms until the fire-damaged wing is restored.