Some of the deadliest mass shootings in the U.S. this year prompted national horror, including the Parkland, Fl., high school shooting and the massacre at the Tree of Life synagogue in Pittsburgh. News of other mass shootings reached only local audiences. There were a number of incidents where spouses or former spouses killed their partners (and sometimes their children) in Texas, Delaware, Tennessee, Maryland and California, ABC News reports. The FBI defines a mass shooting as an incident where four or more people — not including the suspect — are killed.
While there is no publicly accessible federal tracker of such incidents, various groups and watchdog organizations keep their own lists, often using different definitions of what qualifies as a mass shooting. ABC News found 18 shootings so far this year that took place over the course of one day and involved four or more victims, not including the suspect. Shooting sprees that spanned longer amounts of time were not included. There are hundreds of other deadly shootings that took place across the U.S. this year that don’t fit this definition, including some that received national attention, like the shooting at a Maryland Rite Aid, or the shooting at a Chicago hospital. In both of those incidents, three victims were killed and the respective suspects also killed themselves.