Authorities in San Diego are investigating a deadly attack at the city’s largest mosque that left three people dead, including a security guard, after two suspects allegedly opened fire on the building. Law enforcement officials say the incident appears to be a hate crime, and both suspects were later found dead from apparent self-inflicted gunshot wounds in a vehicle near the scene.
The Shooting Incident
The attack occurred on Monday, May 17, 2026, at the Islamic Center of San Diego. Police responded after reports of gunfire and discovered the three victims outside the mosque. One of the victims, a security guard, was praised for heroic actions that helped save lives.
Law enforcement initiated an active-shooter response, clearing the mosque and an adjacent school. Police later found the suspects inside a car, both deceased, reportedly from self-inflicted gunshot wounds.
Authorities are reviewing security footage and other evidence from the scene to understand the sequence of events and determine whether the attack could have been prevented.
Suspects Identified
One of the suspects has been identified as 17-year-old Cain Clark, a homeschooled wrestler. Audio from police dispatch and law enforcement sources confirmed his identity. The second suspect, 18 years old, has not been publicly named.
Police say they are investigating hate speech found on one of the weapons and a suicide note left in one of the suspect’s homes containing writings about racial pride. While authorities have described the note as “generalized hate speech,” there were no specific threats to the mosque mentioned.
Background on Cain Clark
Clark, 17, had been placed in an online homeschooling program in 2021. Before that, he attended Kate Sessions Elementary School and the San Diego School of Creative and Performing Arts. Clark also participated in wrestling at Madison High School between 2024 and 2025, earning awards and recognition on his team.
Officials said he had no disciplinary record beyond an elementary school incident in 2015 when he punched another student. Family members and former teammates expressed shock at the shooting, describing Clark as a student who had been trying to fit in and make friends, with no known history of violent behavior or extremist beliefs.
Investigation Details
The FBI and local law enforcement are working together on the case. Investigators are interviewing family, friends, and others close to the suspects while examining weapons, social media, and other evidence.
Police confirmed that Clark’s mother had called authorities earlier on the day of the attack to report her son missing along with several of her firearms. The pair were reportedly dressed in camouflage and considered potentially dangerous, triggering a larger threat assessment.
San Diego Police Chief Scott Wahl emphasized the tragedy as “a city and a community’s absolute worst nightmare,” while noting that authorities are reviewing every possible lead to understand how the attack unfolded and whether steps could have prevented it.
Community Impact
The shooting has left the San Diego community reeling. Officials say this incident represents a serious hate crime, and authorities are urging the public to provide any information that may help with the ongoing investigation.
The attack also raises concerns about online schooling, social isolation, and access to firearms among youth, as well as the challenges of preventing radicalization or violent behavior in communities.
