The Altamira prison brawl was a deadly fight that occurred on 4 January 2012 in Altamira, Tamaulipas, Mexico. Officials from the state of Tamaulipas confirmed that 31 people were killed, with another thirteen injured.[2] The fight started after a drug gang burst into a section of the prison where they were banned from, attacking their rival gang housed there, triggering the fight.[3] During the altercation, the inmates used several kinds of white arms to kill their opponents.[4] The prisoners also used sticks and knives to massacre the members of the rival gang.[5]