The Gregory Gardens case was reported to police at 7:23 p.m. Sunday after a Mount Diablo Unified School District security officer responded to an alarm at the school, located at 1 Corritone Court, and found that a classroom had been entered and vandalized.
Classroom equipment had been tampered with and racial slurs written on several interior surfaces, police said. "There was some wiring to equipment that was cut and damaged," Police Cpl. Matt Kristic said.
Several phrases had been scribbled in marker on various surfaces and on the chalkboard in chalk, Kristic said. The phrases alluded to multiple races and included sexually derogatory comments.
Investigators do not believe the slurs were directed at any specific person.
Nothing appeared to have been taken from the classroom and Kristic said it appears the vandal or vandals forced entry through a window.
Additional graffiti was found this morning at Valley View Middle School, where someone had spray-painted "white pride" messages on exterior walls, Kristic said.
It is not yet clear whether the crimes are linked. "We really can't determine at this time whether these two are related," Kristic said.
He said he is not aware of any other racially motivated graffiti in the city recently.
Anyone with information on either crime is asked to call Pleasant Hill police at (925) 288-4630.