Threats from both at home and abroad are worrisome, senior officials from the Department of Homeland Security, the FBI and members of Congress say.

FBI Director Christopher Wray says he's concerned a lone wolf or small groups will draw "twisted inspiration" from events in the Middle East or Russia.

The Justice Department announced the arrest of a man they say planned to carry out attacks on churches over the weekend after pledging support to the terror group ISIS.

The six intelligence chiefs testified about "worldwide threats" on Monday.

Hamas and Hezbollah militants associated with the Israel-Hamas war “may potentially be encountered at the southwest border," U.S. Customs and Border Protection warned

The Department of Homeland Security on Wednesday announced $20 million in grant funding aimed at preventing targeted violence and terrorism in the United States.

The Michigan AG says domestic terrorism is one of the biggest threats in the U.S. after last week's sentencing of two men who plotted to kidnap Gov. Gretchen Whitmer.

Eleven people armed with long guns who claimed to be a part of group called "Rise of the Moors" were arrested following a standoff with Massachusetts police Saturday.

In several recent FBI investigations, the Oklahoma City bomber has appeared.

The DOJ's inspector general released a report identifying significant issues with how the FBI handled investigations into so-called 'homegrown violent extremists.'

Homeland security officials in New Jersey are warning residents of the potential terrorism threats the state faces from extremist and white supremacist groups.

A Queens woman who pleaded guilty last August to plotting to build a bomb for a terrorist attack inside the U.S. was sentenced to 15 years in prison Thursday.

A truck driver, Thomas McVicker, was arrested for threatening to commit mass shooting at a Memphis church.

The El Paso mass shooting and other attacks deemed "domestic terrorism" have renewed questions about the threat and whether U.S. authorities have the tools to stop it.