Three people were shot Wednesday night at a high school graduation ceremony being held at Fairfield High School in Fairfield, near Sacramento, officials said.
The shooting occurred during Sem Yeto High School's graduation, which was being held at Fairfield High, and Mayor Alma Hernandez of neighboring Suisun City wrote on Facebook that the victims were shot at Schafer Stadium and that a search for the shooter was underway.
A Fairfield-Suisun Unified School District spokesperson said the shooting happened after the ceremony had ended.
The Solano County Sheriff's Office said it was assisting Fairfield police with the investigation.
The conditions and ages of the victims were not yet known, the statement said, and the circumstances of the shooting remain under investigation; a suspect description was not available.
Sem Yeto is a continuation high school and shares a physical campus with Fairfield High, the account said.
Anyone with information on the incident was urged to contact Fairfield police.