The number of active shooter incidents in the United States increased by over 100 deaths in the next two years, according to the FBI.
The FBI defines active shooter incidents as those in which a person with a gun tries to kill people in a populated area.
Mass killings with three or more deaths increased from five in 2020 to 12 last year.
There were 32 active shooter incidents last year which did not include self-defense, domestic, gang or drug-related shootings.
In the past, the majority of alleged active shooters were male, and about half of shooting suspects were captured by law enforcement rather than being killed by law enforcement or dying by suicide.
The FBI said in a release that it noticed a growing trend of active shooter attacks in multiple locations, either during a single day or over multiple days.
In March of last year, 10 people were killed at a King Soopers grocery store by an individual allegedly wielding a pistol and a semiautomatic handgun.
Less than two weeks after a mass shooting at a Buffalo grocery store left 10 people dead and roughly one month after a shooting aboard a New York City subway train left 10 people shot and 29 injured, the FBI's report came. Since the beginning of the Covid-19 pandemic, active shooter incidents have more than doubled, according to a research letter published by the JAMA Network. The idea of tighter gun control laws is unpopular among Democrats. More than half of US adults think stricter gun control laws will lead to fewer mass shootings, including more than half of Democrats and Democratic-leaning independents, but less than a third of Republicans and Republican-leaning independents.
Researchers think covid stress could be to blame for mass shooting.