SAN RAMON, Calif. – A student at California High School in San Ramon is taking responsibility for writing racist graffiti in the boys’ bathroom, while a second case of racist writings in the girls’ bathroom remains unsolved.

Last week, students snapped pictures of the words “colored” and “whites” scrawled in black marker above two urinals in the boys’ restroom at the school and posted the images to social media. School officials contend the images immediately sparked an investigation, though parents contend they had to force administrators to take action, KTVU reports.

MORE NEWS: Know These Before Moving From Cyprus To The UK

“We brought up the issue to the admin and they kind of shooed it away. They didn’t want to address it at first until there was pressure from parents and our club,” according to one parent, who did not want to be identified.

“When I called San Ramon Police Department yesterday, they knew nothing of the incident,” the parent, a father of a sophomore at the school, said Tuesday. “I called the San Ramon Police Department and had them meet me up here to write an actual report of the incident and they said it was the first time they heard of the incident.”

On Monday, students discovered more racist graffiti in the girls’ bathroom that used racial slurs and targeted a specific race, though KTVU did not reveal the exact content. The East Bay Times reports the second message in the girls’ bathroom stated a specific race was not welcome to use the facility.

The graffiti from last week was gone by the time police arrived on Monday to document incident, though it was not removed by school officials or maintenance staff. The second incident on Monday was documented by police before it was immediately removed by the school, according to the news site.

Principal Sarah Cranford met with students in the Black Student Union and school administrators went from classroom to classroom on Tuesday to discuss the incidents with students, KTVU reports.

[xyz-ihs snippet=”NEW-In-Article-Rev-Content-Widget”]

MORE NEWS: How to prepare for face-to-face classes

“They wanted the kids to know about it, have the right information, and that they understood it would be taken seriously,” San Ramon Valley School District spokeswoman Elizabeth Graswich said.

Parents contend they were not notified about the racist graffiti until after the second incident.

“I’m shocked. Kids grow up here, coming from Bollinger to Iron Horse to here, never come across an issue like that,” parent Charlie Rosales said. “Being Hispanic, we’re all different kinds of friends. This is surprising.”

The incidents come on the heels of the school’s week long “Breaking Down the Walls” program aimed at unifying and empowering students on campus.

“It was a week long program and it’s disappointing that so soon after something where we invested so much time and energy, and it was such a great experience for everyone, that something like this would happen,” Graswich said.

It’s now homecoming week for California High School 2,700 students, of which 49 percent are white, 28 percent Asian, 12 percent Hispanic and 4 percent black.

“I didn’t expect it to come from our campus, but it also lets us address that there is racism out here in the suburbs when nobody thinks there is,” Skylar Robinson, a sophomore member of the Black Student Union, told KTVU.

The student who claimed responsibility for the first incident came forward Tuesday, officials said, and will face “appropriate school disciplinary action,” Graswich said, though she declined to detail the punishment.

The San Ramon Police are continuing to investigate the second case but have not identified any suspects.

“Some of the kids I’ve talked to, they’re in fear,” said the father who reported the first incident to police. “They don’t like it, they feel like they’re being disrespected, and they don’t have a voice within the school.”