Stanford University is condemning an anti-Semitic incident on campus in which swastikas and an image resembling Adolf Hitler were left on a student’s dormitory door.

The images were discovered on a chalkboard posted on the door Friday morning in what the Stanford administration described as a «blatant threat to an individual student,» the school said in a letter to students. The campus public safety department is investigating it as a hate crime.

The school also posted a notice on its Protected Identity Damage site, where you can report incidents of hateful and discriminatory conduct.

“Intentionally intimidating and threatening individuals based on protected identities is antithetical to Stanford’s values,” the notice said. «Anti-Semitism and other acts of hate and bigotry are unacceptable on this campus.»

The school urged anyone with information on the perpetrator to contact public safety.

The men’s room was similarly defaced with anti-Semitic imagery in a campus building a week before the dormitory door incident. The school reported finding a swastika with «KKK» around it carved into the wall of a handicap stall on March 3.

And on February 28, a different bathroom was vandalized with multiple swastikas, the N word, and the letters «KKK.» the school said.

Stanford said both incidents were considered hate crimes under California law.

«Vandalizing property, particularly with words intended to threaten and intimidate individuals (specifically in this case, the Black and Jewish communities) is contrary to Stanford’s values,» the school said in a statement. «It’s absolutely unacceptable in our community.»

The university has been able to identify a perpetrator in those incidents.