"U.S. citizens are strongly encouraged to maintain a high level of vigilance," the agency said on its website.
The FBI said Ayman al-Zawahri and Osama bin Laden coordinated the 9/11 attacks.
Democrats’ first attempt at responding to the back-to-back mass shootings in Buffalo and Uvalde, Texas, has failed in the Senate.
The suspect described the plan to a paid FBI informant who also drove the suspect around Dallas in February to conduct surveillance on Bush's home, library and offices, according to a search warrant.
Don’t be alarmed if you see people wearing hazmat suits throughout the city, this is a part of training that is taking place throughout the week.
According to the department, a "man-made catastrophe" is planned at the plant and will be manipulated to appear as if Ukraine was responsible for the attack.
Mohammad Ahmad al-Qahtani was flown back to Saudi Arabia, to a treatment facility.
The death sentence of convicted Boston Marathon bomber Dzhokhar Tsarnaev was reinstated Friday by the U.S. Supreme Court.
Boston Marathon bomber Dzhokhar Tsarnaev's $1,400 COVID-19 stimulus payment can be used to help pay the millions of dollars he is ordered to pay his victims, a judge has ruled.
Saturday's attack marked the first known time that a suicide bomber has killed victims in eastern Congo, where an Islamic State group affiliate earlier this year took responsibility for a suicide bombing near another bar in Beni who had caused no other casualties.
FBI officials believe they have not captured all of the people responsible for the Pan Am bombing that killed 270 people, including 190 Americans in 1988.
Warning that extremism in the ranks is increasing, Pentagon officials are issuing detailed new rules prohibiting service members from actively engaging in extremist activities.
The man is allegedly from Saudi Arabia and "is linked to several Yemeni subjects of interest."
Jeffrey Rambo, an agent who acknowledged running checks on journalists in 2017, told federal investigators the practice is routine.
The juvenile, a student who attends La Grange Middle School, was later detained and charged.
A jury has completed the first day of deliberations in a civil trial of white nationalists accused of conspiring to commit racially motivated violence at the deadly “Unite the Right” rally in Charlottesville in 2017.
U.K. police say an explosion in a taxi outside a Liverpool hospital that killed the suspected bombmaker is being treated as a terrorist incident.
The Paris Terror Attacks of 2015 live in the minds of the French every day, but especially on Nov. 13. Here’s a look back at what happened the night of the attacks.
While DHS said it had no credible information on a specific threat, the agency warns in its latest national terrorism advisory bulletin that mass gatherings for the upcoming religious holidays could be potential targets.
A woman who was pushed to safety as a car slammed into counterprotesters at a 2017 white nationalist rally in Charlottesville has recounted a scene of “complete terror."