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Mass murder is the act of murdering a number of people, typically simultaneously or over a relatively short period of time and in close geographic proximity. The FBI defines mass murder as murdering four or more persons during an event with no "cooling-off period" between the murders. A mass murder typically occurs in a single location where one or more people kill several others.
This category has the following 11 subcategories, out of 11 total.
- ► Mass murders (5 C)
- ► Mass murder by city (4 C)
- ► Mass murder in fiction (3 C, 93 P)
- ► Genocide (13 C, 58 P)
- ► Mass murderers (6 C, 3 P)
- ► Unsolved mass murders (2 C, 17 P)
- ► Mass murder victims (15 C, 27 P)
- ► Weapons of mass destruction (8 C, 25 P)