The incident began at early hours of the morning in Culiacán, Sinaloa with the discovery of a vehicle on fire. 2011–2012 Sinaloa massacresĪs a response for the killings in Veracruz, Los Zetas carried out an incursion to the state of Sinaloa on 23 November 2011 and left 26 bodies - 16 of them burned to death - in several abandoned vehicles in Sinaloa. Security measures increased in the area after the gruesome discovery. on June 11, but the authorities finished picking them up at around 7:00 a.m. Alerted by an anonymous call, the bodies were found on 8:00 p.m. On 11 June 2012 in the municipality of Álamo, Veracruz, 14 dismembered bodies were abandoned inside a Nissan truck on a highway near the border with Tamaulipas. The Jalisco New Generation Cartel was also responsible for 67 killings in Veracruz on 7 October 2011. And a day after his resignation, 10 more bodies were found throughout the city of Veracruz. A day later, Reynaldo Escobar Pérez, the State Justice Attorney General, stepped down and resigned due to the drug-violence. Four other bodies were confirmed separately by the state government of Veracruz. The third and final house contained one body. While searching at another house they found 11 more bodies. The Mexican Navy first discovered 20 bodies inside a house in a residential neighborhood. On 6 October 2011 in Boca del Río, Veracruz, 36 bodies were found by the Mexican authorities in three different houses. Nonetheless, on 27 September 2011, the Jalisco New Generation Cartel released a video claiming they had carried out these attacks against Los Zetas, and that they were planning to take over Veracruz. The Blog del Narco reported on 21 September 2011 that the message was supposedly signed by Gente Nueva, an enforcer group that works for Joaquín Guzmán Loera, the top boss of the Sinaloa cartel. Other gunmen pointed their weapons at the frightened drivers. They opened the doors of the trucks and pulled out the thirty-five corpses, leaving a written message behind. Once the traffic stopped, armed men abandoned two trucks in the middle of the highway. According to El Universal, at around 17:00 hours an undetermined number of vehicles blocked a major avenue in Boca del Río. Some of the victims had their hands tied and showed signs of having been tortured.

All of the corpses were alleged to be members of Los Zetas, but it was later proven that only six of them had been involved in minor crime incidents, and none of them were involved with organized crime.

On 20 September 2011, two trucks containing 35 dead bodies were found at an underpass near a shopping mall in Boca del Río, Veracruz. The recent tit-for-tat fighting between Los Zetas and the Sinaloa cartel started last fall in Veracruz, a strategic smuggling state with a giant gulf port. The killings are the latest 'salvo in a gruesome game of tit-for-tat in fighting' among Mexican drug cartels. Below are the recent massacres that have occurred in several parts of Mexico between Los Zetas and the Sinaloa Cartel, who fight to take over each other's territories. The Mexican organized crime groups often leave multiple bodies in public places as warnings to their rivals these criminal groups have been fighting for the control of the drug corridors to the United States, the local drug markets in cities, extortion rackets, and human smuggling.

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