A new FBI study examining “lone offender terrorism” found common traits that could help identify future attackers.

UK government watchdog David Anderson reports that smaller-scale attacks are more difficult to detect and prevent, and that they are usurping massive, 9/11-scale terrorist plots as a top risk in Britain.

A gunman opened fire Thursday afternoon in a Minneapolis sign-making business, killing four people and wounding four others before fatally shooting himself.

Six people were killed when a gunman attacked a Sunday service at a Sikh temple in Wisconsin on Sunday; three are still in critical condition.