A swastika reportedly was found Tuesday morning near the entrance to Needham High School in Massachusetts.
According to the Boston Globe, Principal Aaron Sicotte sent a letter to parents announcing that a swastika was left near a door to the school's lobby.
"At this point, we do not know the exact time or who was involved," Sicotte reportedly wrote. "I know you share my disgust at the offensive and hateful act."
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School officials notified police in Needham about the incident.
Sicotte said this is the third time during the school year that racist graffiti was found.