A shooting outside a California high school graduation ceremony kills an 18-year-old student and wounds three others, including an 11-year-old child, according to multiple reports. The incident occurs Wednesday in Fairfield, in Northern California, as people gather for the graduation event. Fox News, ABC News, and the Los Angeles Times all report that gunfire erupts outside the school during the ceremony and that investigators are seeking witnesses and working to determine what led to the shooting.

The reports agree on the reported casualty figures: one death and three injuries. The injured include an 11-year-old, along with two additional people whose ages are not specified in the provided summaries. The Los Angeles Times notes that detectives are interviewing witnesses as they assemble details of the timeline and circumstances. None of the provided sources offer a suspect’s name or confirmed motive. Authorities are still determining the cause and whether there are links to other incidents, while efforts continue to gather statements from those present.