A teenager was killed and three people were wounded Wednesday evening in a shooting after a high school graduation ceremony in California.

CNN reports that gunfire erupted at about 7:15 p.m. in the parking lot of Fairfield High School in Fairfield, about 50 miles northeast of San Francisco.

The person who died was an 18-year-old stuident who had just graduated. The three wounded victims are 11, 20 and 25. Their conditions were not disclosed

Several days after the shooting, authorities said they did not have any suspects in custody.

The shooting occurred after a graduation ceremony for Sem Yeto High School, an alternative school in the Fairfield-Suisun Unified School District that shares a campus with Fairfield High. The ceremony took place at Fairfield's Schaefer Stadium.

Fairfield police later identified the fatality as Jamario Baker, the Press Democrat reports. Baker was killed outside Schaefer Stadium moments after the graduation ended. He was still wearing his cap and gown.