School officials are investigating after they say a hateful image was found drawn on the wall of a Massachusetts high school bathroom Thursday morning.

In a letter sent home to parents, Newton High School South Principal Tamara Stras says a swastika was drawn “with chocolate or a similar substance” on the wall of the boy’s bathroom located in the 6000 wing of the school.

“I cannot express the anger and disappointment that we all feel because we have people who are continuing to perpetuate hate in our building,” she said.

School officials say they’ve contacted the South Human Rights Council, their incident response team, and their Jewish Staff Affinity Group for student support.

“I want to assure you that we as a school and district are deeply dedicated to addressing hate and discrimination issues and educating our students to stand up against hate,” Stras said. “South will always strive to be a place where all feel seen, heard, and supported.”