The centenary commemoration of the Tulsa Race Massacre in Oklahoma could spark racial violence and top white groups, the U.S. Department of Homeland Security warned in a letter.
"We are examining whether the upcoming memorial events commemorating the 100th anniversary of the Tulsa Race Massacre in Oklahoma could be an attractive target for some racist or white violent individuals to commit violence," the department said, according to an invitation received by NBC News.
The memo, released earlier this week, was not specific to any of the several events that took place over the holiday weekend, but said that top white groups could see any crowd or public gatherings without warning on Tulsa.
Greenwood residents commemorate the 100th anniversary of the assassination of the Tulsa Race Massacre
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The Tulsa Police Department said it was prepared and asked for public assistance in reporting anything unusual.
"If anyone sees anything suspicious, report it to our entire city, report it," Tulsa police chief Wendell Franklin told a news conference this week.
Historically, white activist groups have resorted to such tactics as carjackings, handguns, and ammunition or explosives in racist attacks, says Homeland Security's call.
“Our goal is simple. We are here to protect the safety of all people in our city, ”said Franklin. "All Tulsa police will be taking part in the event in the next few days."
Crowd control will be a priority, he added.
The Tulsa Race Massacre Centennial Commission has organized a series of public events; however, its "Remember & Rise" event featuring Grammy Award-winning singer John Legend and Stacey Abrams, Georgia Democrat, was suddenly canceled on Thursday.
Many celebrities and celebrities are expected to attend several events, including President Joe Biden, who is expected to visit Tulsa on June 1.
As many as 15,000 people were identified as attending the weekend's festivities, Homeland Security said.
In the evening of May 31 until the afternoon of June 1, a violent mob of hundreds of white people stormed the Tulsa district of Greenwood, known as Black Wall Street for its prosperous Black community, burning down businesses and homes and killing 300 black people.