In San Fernando, Tamaulipas, Mexico, over 193 victims of Los Zetas were exhumed from several mass graves.

San Fernando is a city located in the Mexican state of Tamaulipas; it serves as the seat of the surrounding municipality of the same name. It is about 85 miles (137 km) away from Brownsville, Texas, United States. The municipality has a population of 57,220, while the city itself has a population of 29,665.

Los Zetas is a Mexican criminal syndicate and designated terrorist organization, known as one of the most dangerous of Mexico's drug cartels. They are known for engaging in brutally violent "shock and awe" tactics such as beheadings, torture, and indiscriminate murder. While primarily concerned with drug trafficking, the organization also ran profitable sex and gun rackets. Los Zetas also operated through protection rackets, assassinations, extortion, kidnappings and other illegal activities. The organization was based in Nuevo Laredo, Tamaulipas, directly across the border from Laredo, Texas. The origins of Los Zetas date back to the late 1990s, when commandos of the Mexican Army deserted their ranks and began working as the enforcement arm of the Gulf Cartel. In February 2010, Los Zetas broke away and formed their own criminal organization, rivalling the Gulf Cartel.

The 2011 San Fernando massacre, also known as the second massacre of San Fernando, was the mass murder of 193 people by Los Zetas drug cartel at La Joya ranch in the municipality of San Fernando, Tamaulipas, Mexico, in March 2011. Authorities investigating the massacre reported numerous hijackings of passenger buses on Mexican Federal Highway 101 in San Fernando, and the kidnapped victims were later killed and buried in 47 clandestine mass graves. The investigations began immediately after several suitcases and other baggage went unclaimed in Reynosa and Matamoros, Tamaulipas. On 6 April 2011, Mexican authorities exhumed 59 corpses from eight mass graves. By 7 June 2011, after a series of multiple excavations, a total of 193 bodies were exhumed from mass graves in San Fernando.