In Peru, some citizens are tired of violence and insecurity in their streets, so they have decided to fight injustice on their own.

This is the case of numerous vigilante groups that are mobilizing through Facebook in order to track criminals and publicize their extrajudicial punishments. Usually they are citizens from Lima’s poorest districts. They assemble through social media to fight crime, often with brutal tactics, and some innocent people have been hurt, reports the travel website Roads & Kingdoms.

Among this vigilantes groups there is GREVA, an acronym for The Union of Resocialization for the District of Victoria. Founded in 2007, the group was comprised of reformed ex-convicts, was organized largely through Facebook, and formed part of a grassroots movement to combat rising crime that had resulted from the country’s flourishing drug trade. Peru is the world’s second largest producer of cocaine, and suffers from some of the highest crime rates in South America.

Read the full report about the Facebook vigilantes in Perú at Roads & Kingdoms.