On Nov. 1, an unidentified individual posted flyers reading "It's okay to be white" on the doors of a high school in Silver Spring, Maryland.
Surveillance video showed the person, whose face was hidden by a hoodie, hanging the flyers on 10 of Montgomery Blair High School's doors before class, WJLA reports.
The signs were found at around 5:45 a.m. and removed before students arrived for classes for the day.
Parents and students were upset and shocked by the act.
The school is a diverse one: 15 percent of Blair’s student body is Asian, 24 percent are black and 33 percent are Hispanic.
“Really? Those type of posters? In a school as diverse as Blair,” asked senior Antoinette Ntomb.
"As a parent, yeah, it’s something that troubles me," said parent Shaun Burke. "It troubles us."
"I am hoping there is not a repeat, but I guess we will see," added parent Mayu Mishina.
Principal Renay Johnson believes the flyer was meant to incite racial tension.
"We are taking this seriously and are investigating this incident," Johnson said, reports NBC News. "Our research so far has indicated that this may be part of a concerted national campaign to foment racial and political tension in our school and community."
Johnson and the students believe attempts to divide the campus will fail.
"We will not fall victim to attempts to divide us," Johnson wrote in a letter to parents. "We are committed to providing a safe and welcoming environment for every student."
"All of us are equal," added senior Melissa Oliver.
Others online took issue with the school's response.
"If the signs said 'It's okay to be black.' the media would have found some little street urchin with a big smile, named him or her as doing it (better if it's a girl), and done a mini-video of her life-story and how she walks ten miles uphill both ways to school," wrote one man in NBC News' comments section.
"This story just shows that it's not ok to be white," commented a second. "We have gotten to a point where the most basic and obvious truths can't be spoken because of politically correct mind-control."
The school was just one of many campuses that have received similar messages, The Washington Post reports. Flyers and stickers were also found in New Orleans, Massachusetts and Ohio.
It was part of a larger online campaign from online bulletin board 4chan urging others to display such posters on "campuses and elsewhere" on Halloween night.