Assailant kills six at Nashville school in latest US mass shooting

A heavily armed former student killed three young children and three staff in what appeared to be a carefully planned attack at a private elementary school in Nashville on Monday, before being shot dead by police.

Chief of Police John Drake named the suspect as Audrey Hale, 28, who the officer later said identified as transgender.

Hale left behind a manifesto, had maps of the school detailing surveillance and entry-exit points, and was "prepared for a confrontation with law enforcement," the police chief told reporters following the latest outburst of gun violence in the United States.

In an interview with NBC News, he said the suspect was likely plotting a broader attack, as the manifesto "indicates that there was going to be shootings at multiple locations, and the school was one of them."

Armed with at least two assault rifles and a handgun, Hale entered The Covenant School, a Christian academy, from a side entrance, allegedly shooting through a door -- firing multiple shots while advancing through the building, according to police.

Police identified the six victims, saying one of the three children was eight years old and two were aged nine, while the adults killed were aged 60 to 61.

One of the victims, Katherine Koonce, is listed as head of the school on the academy's website.

On Monday night, as the country digested another mass shooting that claimed the lives of children, people left flowers at a makeshift memorial outside the school. Some kneeled in prayer.

There was some initial confusion about the shooter's gender identity. While police referenced "she" and "her", the suspect's LinkedIn profile suggested Hale identified as a man.

Police said officers were on the scene within about 15 minutes...