SAN RAMON (KRON)—A third incident of racist graffiti has been found at California High School in San Ramon.

The district spokesman told KRON4 Thursday that the case is still under investigation.

Racist graffiti was found two times last month at the high school.

The first case was reported on the week of October 17.

School administrators could not find the graffiti which means it could have been removed.

A student admitted being responsible for the graffiti in that case, administrators said.

The second case was reported a week later on October 24 after graffiti was found in the bathroom. Stay with KRON4 News for updates on air, online and on our mobile app.