The Century station is based in Lynwood and covers Florence/Firestone, Walnut Park, Willowbrook and Athens Park, according to the Sheriff's Department.
The sheriff of Los Angeles County says his detectives foiled what might have been a shooting massacre at a South Los Angeles school just over a week after a deadly school shooting in Santa Clarita.
"The students that the suspect made the threat to reported it to the school administration".
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 reported what they heard allowed authorities to "prevent a possible tragedy today", said the sheriff.
The students alerted teachers and police were notified.
Villanueva said the weapon did have a serial number, but it was not registered. Sheriff's officials said a 19-year-old man, who is a relative of the student, was also arrested on suspicion of possessing an unregistered firearm.
The boy said he would conduct the shooting on Friday at Animo Mae Jemison Charter High School in Willanbrook, Villanueva told a news conference.
They served a search warrant that resulted in the seizure of the rifle, ammunition, a drawing of the school layout as well as a list of intended victims, he said.
The boy was arrested without incident at his home on suspicion of making criminal threats, the sheriff said.
The 13-year-old was taken into custody without further incident, authorities said.
Berhow used the.45-caliber handgun to kill two classmates at Saugus High School in Santa Clarita on November 14 before shooting himself.
Deputies talked to an informant Thursday who said a fight that occurred on the school's campus earlier that day, according to a sheriff's department statement. No weapons were recovered in the case. 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 Nathaniel Berhow's.45 caliber, 1911-model replica semi-automatic pistol was assembled from gun parts and did not have a serial number.