Since then, the Los Angeles County Sheriff's Department has investigated at least 30 school threats, spokesman Sgt.
The arrests are the latest effort by authorities to get ahead of a rash of school shooting threats that have rattled the Los Angeles region in the days since a 16-year-old student opened fire on his classmates at Saugus High School in Santa Clarita on November 14, killing two and wounding three others. Covina police beefed up staffing Friday at Charter Oak High School in response to a possible threat targeting the school.
Authorities say an arrest has been made after a student threatened to shoot other students and staff at a Los Angeles-area school.
"The fact that people stepped forward and said what they had heard led us to prevent a tragedy today", he said.
At a morning news conference, authorities confirmed a 13-year-old student was taken into custody but did not disclose any other details on the teen.
A search warrant was obtained and investigators seized an AR-15, 100 rounds of ammunition, a list of students and staff, and a hand-drawn map of the school, authorities said.
In yet a third incident, Sheriff's officials also arrested a student of Pete Knight High School in Palmdale after he allegedly made threats online.
The arrest comes a week after police and witnesses said a 16-year-old boy opened fire on his classmates at Saugus High School, spreading panic throughout the Santa Clarita campus and surrounding neighborhoods.
A 13-year-old student at an LA Middle School was arrested Thursday. The man, who was not identified, was held on $35,000 bail, he said. In a previous tweet, Sheriff Tim Murakami referred to the capture of a "ghost weapon", but Villanueva clarified that the weapon in the case of threat has a serial number. Officers said they found an AR-15 "ghost gun", along with plans and gear to carry out the alleged threat. Police still don't know where and when the shooter got the gun or what was his motive for shooting at Saugus High. Villanueva said Thursday that the.45 caliber gunman, 1911 semi-automatic pistol replica was assembled from parts of the gun and did not have a serial number.