Mass Casualty Incidents in San Diego County, California

Every mass casualty incidents report published for San Diego County, California, newest first.

Mass Casualty IncidentsAug 31, 2026, 5:46 p.m. ETSan Diego, California, United States
Three killed in shooting at San Diego mosque
The district attorney reported three deaths at the Islamic Center of San Diego on May 18.

Three killed in shooting at San Diego mosque