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· collected 2026-09-06 · by Aashish Vashistha
The FBI warned the parents of 18-year-old Caleb Vazquez about his online comments regarding school shootings just days before he allegedly carried out a shooting at a California mosque that left three people dead. The warning was given on May 14, and authorities had previously flagged Vazquez's behavior under California's red-flag law a year earlier, confiscating 26 guns belonging to his father. The lawsuit filed by Vazquez's mother alleges that the mental health treatment facility where he received care failed to intervene despite warnings about his behavior. The suspected shooter, along with another teenager, was found dead in a vehicle from apparent self-inflicted gunshot wounds.
Written by the local model on 2026-09-06,
using this article's own text rather than the other coverage of the
same event (that is the story summary below).
Story summary
Two teenagers, Caleb Vazquez (18) and Cain Clark (17), carried out a mass shooting at the Islamic Center of San Diego on *May 18*, killing three people, including a security guard. Prior to the attack, the FBI had warned Vazquez's mother about her son's concerning comments about school shootings online, which he made on the dark web, and contacted her on May 14. The mother allegedly passed this warning to staff at the mental health treatment facility where Vazquez was staying, but it is claimed that they failed to intervene despite signs of an imminent threat. Vazquez had been receiving treatment for depression and psychotic episodes at Park Mental Health Treatment of San Diego.
Written for “California Mosque Shooting Probe” on 2026-09-07,
grounded in this article and the 1 other(s) covering the same event.
Why this leaning score
This article does not take a side on a contested political
question, so it has no leaning score. That is an
answer rather than a gap: a match report or a rescue can be warmly
or critically written without being left or right, and scoring it
anyway is how approval of a subject gets recorded as a political
position.
No political leaning scored for article 5781 · logged 2026-09-06
The FBI warned the parents of one of the teenage suspects about his concerning comments regarding school shootings on the dark web just days before a shooting at a California mosque left three people dead, according to a lawsuit filed by his mother.
uncertain
shooting → warn → mother
According to the Associated Press, federal authorities contacted the mother of Caleb Vazquez on May 14, warning her that her 18-year-old son had been making troubling remarks about school shootings online.
uncertain
son → accord → shootings
Vazquez's mother allegedly passed the warning to staff at the mental health treatment facility where he was staying and receiving care.
uncertain
he → pass → care
The FBI warning came days before Vazquez and another teenager, 17-year-old Cain Clark, allegedly carried out the shooting at the Islamic Center of San Diego.
uncertain
Vazquez → come → Diego
Three people, including a security guard, were killed in the attack before the two suspected gunmen were found dead inside a vehicle from what police said appeared to be self-inflicted gunshot wounds.
asserted
police → include → vehicle
Police had rushed to the mosque after receiving reports of an active shooter.
asserted
Police → rush → shooter
San Diego Police Chief Scott Wahl said officers arrived within four minutes and found three victims dead outside the Islamic Center.
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officers → say → Center
Authorities also received reports of gunfire nearby, including an incident in which a landscaper at the site was fired upon but not hit.
asserted
landscaper → receive → site
Dozens of police vehicles surrounded the Islamic Center as officers launched an active-shooter response and searched the mosque and an adjacent school.
asserted
officers → surround → mosque
Authorities briefly placed the area under lockdown and urged residents to remain indoors before declaring the threat neutralised.
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threat → place → residents
The suspected shooters were later found dead in a vehicle in the middle of a nearby street.
asserted
shooters → suspect → street
Wahl said they appeared to have died from self-inflicted gunshot wounds and that no police officers had fired their weapons.
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officers → say → weapons
The lawsuit filed by Vazquez's mother alleges that Park Mental Health Treatment of San Diego failed to intervene despite warnings about her son's behaviour.
asserted
Treatment → file → behaviour
Vazquez was receiving treatment there for mental health problems, including depression and psychotic episodes, according to the court filing.
uncertain
Vazquez → receive → filing
The lawsuit says Vazquez had previously been hospitalised after telling a classmate that he wanted to carry out a school shooting.
asserted
he → say → shooting
Authorities had also flagged his behaviour a year earlier and confiscated 26 guns belonging to his father under California's red-flag law.
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Authorities → flag → law
Authorities have said Vazquez met Clark online and that the two were radicalised there.
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two → say → Clark
Police have not disclosed further details about their relationship or said whose weapons were used in the shooting.
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weapons → disclose → shooting
The mental health facility has disputed the allegations, saying neither Park nor its employees were responsible for Vazquez's actions.
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Park → dispute → actions