Multiple killings or attempted killings refer to incidents where two or more people are killed or severely injured in a single incident, usually due to a criminal act. This may include mass shootings, serial killings, mass stabbings, serial bombings, gang violence, terrorism, and other forms of homicide. Multiple killings can also occur in cases of domestic violence, child abuse, or elder abuse. In some cases, multiple attempted killings may involve a single perpetrator attempting to kill multiple victims, such as in a school shooting or a mass stabbing attack. Other times, multiple attempted killings may involve multiple perpetrators, such as in a gang shooting or an act of terrorism.