FBI links San Diego mosque attack to online white supremacist radicalisation
Two teenagers aged 17 and 18 killed three people at a San Diego mosque before taking their own lives, with the FBI confirming the pair were radicalised online and exchanged white supremacist views.

The Federal Bureau of Investigation has identified online radicalisation as a primary factor in the deadly attack on a mosque in San Diego on Monday. Authorities confirmed that the two assailants, aged 17 and 18, were radicalised in digital spaces where they first met and exchanged white supremacist ideologies.
The shooting resulted in the deaths of three individuals. Shortly after the incident, the two teenage perpetrators took their own lives, ending the immediate threat but leaving investigators to piece together the motivations behind the violence.
In its assessment of the event, the FBI stated that the attackers’ radicalisation was substantiated by writings they had authored. These documents serve as evidence of the ideological framework that guided the assault, highlighting the role of online platforms in facilitating extremist connections.
The investigation into the San Diego mosque shooting is being conducted separately from other high-profile federal probes, including the inquiry into the suspect in the recent US press gala shooting. The FBI’s focus remains on the specific digital and ideological pathways that led the teenagers to commit the act.
As the inquiry continues, the case underscores the challenges authorities face in monitoring online radicalisation. The FBI’s reliance on authored writings and digital interaction records points to a growing emphasis on virtual footprints in understanding the genesis of domestic extremist violence.


