On Monday, a gunman opened fire in the lunchroom of the Madison Jr./Sr. High School, in Butler County, Ohio, injuring four before being apprehended by police.*
Fourteen-year-old James Austin Hancock has been charged in the shooting. On Tuesday, his attorney filed a denial of charges against the teenager.
School shootings have become a tragically common occurrence in the United States. The map below uses data from the non-profit Everytown for Gun Safety to show the wide scope of America's school shooting problem:
Keep in mind, this data only stretches back to 2013; a map using data before then would be far more cluttered.
Monday's shooting is just the latest incident in what looks to be yet another violent year. Here's a map of mass shootings (officially defined as any instance in which four or more people are shot, including the gunman) in just 2016 alone:
Thankfully, no one was killed in this latest incident; unfortunately, that's not always the case.
*Update — March 2, 2016: This article originally misidentified the state in which the shooting took place.