Two 15-year-old girls in Riverside County have been arrested on suspicion of plotting a school shooting at Corona High School after investigators uncovered months of online discussions about carrying out an attack, authorities announced Tuesday.
The investigation began Oct. 6 when the FBI alerted the Corona Police Department to social media communications suggesting a possible threat to the high school, according to an Oct. 20 police news release.
A collaborative investigation led to the immediate arrest of a 15-year-old girl who attended Corona High School.
Two 15-year-old girls in Riverside County have been arrested on suspicion of plotting a school shooting at Corona High School. (Google)
Detectives continued investigating the alleged plot, serving numerous search warrants involving electronic devices and communications and searching several homes throughout Riverside County.
During that investigation, authorities identified a second suspect, a 15-year-old girl who attended Norco High School.
According to police, evidence revealed the two teenagers had spent several months researching school shootings and discussing how they could carry out an attack at Corona High School on an unspecified future date.
The sprawling high school campus serves more than 2,000 students in grades 9 through 12.
Investigators said the girls also discussed ways to obtain weapons but had not been able to acquire any.
Two 15-year-old girls in Riverside County have been arrested on suspicion of plotting a school shooting at Corona High School. (Google)
No weapons were recovered during the searches, police said.
The second teenager was subsequently arrested, and both girls remain in custody on suspicion of conspiracy to commit murder.
Authorities have not disclosed the identities of either suspect because they are minors.
The Riverside County District Attorney’s Office is reviewing the case.
Double homicide suspect in Southern California had blood on hands, police say
Police did not provide details about what prompted the alleged plot or whether investigators had identified any specific intended targets at the school.
The investigation remains ongoing in coordination with the FBI, Riverside County Sheriff’s Office and Corona-Norco Unified School District.
In the release, Corona police emphasized the importance of community awareness and urged parents and students to immediately report suspicious activity or concerning statements.
Additional details about the investigation have not been released.
Anyone with information regarding this investigation is urged to contact CPD Det. Edwards at George.Edwards@CoronaCA.gov or by phone at 951-279-3656.
Copyright 2026 Nexstar Media, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.For the latest news, weather, sports, and streaming video, head to KTLA.