The following is via ABC News:
Federal authorities are warning that white supremacists and other political radicals could look to attack Independence Day revelers on July 4, noting in a bulletin to law enforcement around the country that domestic terrorists “have attacked perceived oppressors, opponents, or enemies engaged in outdoor First Amendment-protected rallies or protests during past summers.”
The warning came in a joint intelligence bulletin issued by the FBI, Department of Homeland Security and National Counterterrorism Center, urging law enforcement personnel to remain vigilant for suspicious activity.
Such bulletins are routinely distributed in the days before a major national holiday, but previous bulletins have often focused on “homegrown” terrorists inspired by overseas groups like ISIS or al-Qaeda rather than “domestic” terrorists radicalized by domestic issues such as abortion or white supremacy.
The bulletin, which was issued Wednesday, makes prominent mention of both threats inside the U.S. homeland.
“The FBI, DHS, and NCTC remain concerned that [they] could target upcoming Independence Day celebrations, gatherings, or parades, though we are unaware of any current plots specifically targeting such events,” stated the bulletin, obtained by ABC News. “We note that attacks can occur with little to no warning because of the frequently lower levels of security around civilian targets, challenges in securing large crowds, and calls for attacks against soft targets.”
Both “domestic” and “homegrown” terrorists “likely would use simplistic tactics and relatively easily obtainable weapons such as firearms, knives, and vehicles—although some violent extremists have historically sought to use explosive devices.”