A Youtube video claiming to come from hacker collective Anonymous has threatened to unmask the dealings of a Mexican drug cartel.
The move follows the abduction of an Anonymous member in the Mexican state of Veracruz - an act described in the video as "a great mistake".
In the video, narrated in Spanish, a suited figure wearing the group's trademark Guy Fawkes mask explains that Anonymous is "tired of the criminal group the Zetas, which is dedicated to kidnapping, stealing and extortion".
The video goes on to allege that it has details of police officers, journalists, taxi drivers and others who assist the cartel - and threatens to publish photographs and other details unless the kidnapped Anon is released.
Local law enforcement has said it cannot authenticate the video, according to a report by the BBC.
Anonymous Twitter account AnonyOps warned those responsible for the video against taking on organised criminals, stating: "Dear anons, don't go after dangerous criminals w/ a history of kidnapping & murder without first learning about your privacy online", prompting the response from another Twitter user:
"Real bad guys have money and can hire serious blackhats to find their enemies, anywhere."
The video was uploaded on 6th October under the username MrAnonymousguyfawkes, but only came to global attention when it was reported last week by intelligence think tank Stratfor.