Drug cartels such as the Los Zetas are known to use acid on civilians. For example, In the 2011 San Fernando massacre, Los Zetas members took away children from their mothers, and shot the rest of the civilians in a bus. The women were taken to a warehouse where many other women were held captive. Inside a dark room, the women were reportedly raped and beaten. Screams of the women and of the children being put in acid were also heard.