On 26 September, an unknown number of gunmen entered the Uniendo Familias drug rehabilitation centre in Colonia Rosario, Chihuahua City, killing 15 and injuring another eight with handguns and assault rifles.
According to Chihuahua State Attorney General César Peniche, the assailants were member of Los Aztecas, a drug distribution gang linked to the Juárez Cartel. Their targets were reportedly members of the Los Mexicles, a gang linked to the Sinaloa Cartel. According to Peniche, the dispute was over control of the local methamphetamine market. Although most of those killed were suspected gang members, several civilians were injured during the incident and at least one died.
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