A woman found dead on a hiking trail in Colorado was killed in a suspected mountain lion attack, the state's first fatal attack since 1999, authorities said. The woman was discovered on Jan. 1 when two hikers came upon a mountain lion lying partially over her body on the Larimer County hiking trail, Colorado Parks and Wildlife said.

After about a year of planning, an 18-year-old was arrested on New Year’s Eve in a suburb of Charlotte, North Carolina, accused by federal prosecutors and the FBI of intending to carry out a terror attack using knives and hammers that same day.

A fire in southwest Berlin that has left tens of thousands in the German capital without electricity was likely the result of a far-left extremist attack, officials said on Sunday.

For years, American lawmakers and other government officials have been haunted by the idea that an enemy could one day launch a massive electromagnetic pulse attack on the United States that would destroy the national power grid, catapulting more than 300 ...

Typical signs of heart attack can include tightness and pain in the chest. But other signs can also include lightheadedness and pain in the neck or jaw. Every year, an estimated 805,000 people in the United States have a heart attack, according to the ...

Sudden surges of anguish can accompany intense mourning. That’s not unusual, experts say, and sometimes even helpful.

A woman in Colorado was killed during a hike in a suspected mountain lion attack on New Year's Day. The woman was found by other hikers on a trail near a mountain lion. NBC News' Ryan Chandler has more on the attack.

Nocturnal panic attacks involve typical panic symptoms, such as sweating and a rapid heart rate, but occur during sleep, leading to disorientation upon waking. Factors that increase the risk of nighttime panic attacks include genetics, stress, changes in ...

Russia has accused Ukraine of killing at least 27 people in a drone strike on a New Year's party in a hotel and cafe in the Russian-occupied southern Kherson region.