The shooting happened just before 10 a.m. at the Oakland Adult and Career Education Resource Center, which uses the old Parker Elementary campus.
SKY7 was over the scene, which showed dozens of evidence markers near a classroom not attached to the main building and a yellow tarp over a body.
The resource center is operated by the Oakland Unified School District.
We have reached out to OUSD and Oakland Police for more information.
Stay with ABC7 News for the latest details on this developing story.