The symbols were added to the Anti-Defamation League’s online “Hate on Display” database, which already includes burning crosses, Ku Klux Klan robes, the swastika and many other overt symbols of racism and anti-Semitism.

“Even as extremists continue to use symbols that may be years or decades old, they regularly create new symbols, memes and slogans to express their hateful sentiments,” Jonathan Greenblatt, the ADL’s CEO, said in a statement.

“We believe law enforcement and the public needs to be fully informed about the meaning of these images, which can serve as a first warning sign to the presence of haters in a community or school.”