Experts say the trauma from surviving a mass shooting can have a lasting impact.

Authorities said two men killed five students and two adults before taking their own lives.

A 12-year-old and a 13-year-old have been arrested after making online threats to local schools, say Winnipeg police.

Trump also said it's critical for highly trained school personnel to have access to firearms because the average duration of an active shooting is less than five minutes.

Elizabeth Lecron, 23, told undercover FBI agents that she wanted to carry out an "upscale mass murder" at a Toledo bar.

A student was killed after a shooting at a North Carolina high school Monday, according to local media.

The boy is charged with attempted murder, having a weapon on school grounds and assault while displaying a dangerous weapon.

About 40 students and supporters are expected to stage a demonstration outside the gun manufacturer's offices in Springfield, Massachusetts at midday Sunday.

The Education Department said it is weighing whether to allow states to use federal funds to purchase guns for schools, prompting a storm of criticism from Democratic lawmakers and educators.

A Massachusetts kindergarten class is drawing attention for using a lullaby to teach students about lockdown drills.