Forty of the firearms that Mexican police seized on April 30 at the home of an alleged drug trafficker in Ciudad Juárez in the northern state of Chihuahua turn out to be among the 2,000 weapons that reached Mexico as a result of the US government's bungled Operation Fast and Furious. The house, which was empty when police arrived, belonged to José Antonio Torres Marrufo, considered by US authorities a top enforcer for the Sinaloa drug cartel of Joaquín Guzmán Loera ("El Chapo"). The weapons were bought legally in Phoenix, Ariz., then taken to El Paso, Tex., and smuggled across the border to Ciudad Juárez.

Another 32 bodies were found in three houses in the Mexican port city of Veracruz Oct. 7, the latest in a series of attacks on presumed members of Los Zetas narco-network by a rival group calling itself the Mata Zetas, or Zeta Killers. The Mata Zetas announced their existence in July, but made their presence known dramatically two weeks ago, leaving 35 bodies on a busy Veracruz highway during rush hour traffic. They later claimed responsibility for the massacre in a video posted to the Internet, in which hooded men presenting themselves as if at a press conference urged Veracruz residents to say 'no' to extortion and intimidation by the Zetas. But authorities say they believe the Mata Zetas are an arm of the New Generation cartel, which is resisting Zeta control of smuggling routes. "The phenomenon in Veracruz is a result of a rivalry between two criminal groups," said President Felipe Calderón's national security spokesperson Alejandra Sota. "Therefore, they must be taken on." (CSM, Oct. 7; LAT's World Now blog, Sept. 30)

Noel Salgueiro Nevarez AKA "El Flaco" (Skinny), the Sinaloa Cartel's top boss in the northern Mexican state of Chihuahua, was captured by army troops Oct. 5 in Culiacán, Sinaloa, in what authorities called a precise operation with no shots fired. El Flaco's arrest "affects the leadership structure, as well as the operational capabilities," of the Sinaloa network in Chihuahua, the Defense Secretariat and Prosecutor General's office said in a joint statement. He is said to be the leader of a criminal gang called the Gente Nueva (New People), which serves as a local enforcement arm of the Sinaloa Cartel (also known as the Pacific Cartel) in Chihuahua. However, the cartel's maximum boss, Joaquín Guzmán AKA "El Chapo" (Shorty), still remains at large. (EFE, Borderland Beat, Oct. 5)

The UN Office of the High Commissioner of Human Rights (OHCHR) on Oct. 1 voiced concerns regarding the growing number of journalists killed in Mexico, and called for Mexican authorities to investigate these crimes and bring those responsible to justice. According to the journalists' rights group, Reporters without Borders (RSF), the discovery on Sept. 24 of the body of Maria Elizabeth Macias, editor of Primera Hora (Nuevo Laredo, Tamaulipas), marked the fourth woman journalist to be murdered in Mexico this year, as well as the eightieth journalist to be killed in the country within the last decade. The death of Macias is believed to be the result of her online blogging activity, which covered organized crime in her neighborhood.

Police in Mexico's resort city of Acapulco found five decomposing human heads left in a sack outside a primary school in the Garita neighborhood on Sept. 26. Handwritten messages were also found, apparently threatening the state governor as well as local drug lords. Five decapitated bodies were earlier found elsewhere in the city. Some 100 schools in Acapulco have been closed since last month with teachers on strike in response to extortion threats from criminal gangs who demanded they hand over half their salaries from Oct. 1. Guerrero state Gov. Angel Aguirre has promised increased police patrols and the installation of security cameras and panic buttons at schools.

The US Treasury Department's Office of Foreign Assets Control (OFAC) on Sept. 21 imposed Kingpin Act sanctions on four Colombian nationals and 12 companies said to be linked to Joaquín Guzmán Loera AKA "El Chapo"—head of Mexico's Sinaloa Cartel. Guzmán faces charges in the US, but remains at large. (WSJ Corruption Currents blog, Sept. 20) The move comes amid increasing charges that US law enforcement—as well as the Mexican government—is favoring the Sinaloa Cartel in Mexico's bloody narco wars.

Leaders of the Mexican Electrical Workers Union (SME) reached an agreement with Mexico's federal government on Sept. 13 that ended a sit-in the unionists had been holding in Mexico City's main plaza, the Zócalo, since March. In exchange for stopping the protest, the union received a pledge that the authorities would negotiate a way for some 16,720 laid-off members to return to work. The government also agreed to free up union funds worth 21 million pesos (about $1.6 million) that it had frozen and to review the cases of SME members arrested in the two years of struggle between the authorities and the unionists.

Two half-naked mutilated bodies left hanging from a bridge in the Mexican border town of Nuevo Laredo, Tamaulipas, were accompanied by "narco-messages" scrawled on cardboard saying the killings were an example of what will happen to "Internet snitches" (relajes del internet). The message was signed "Z," an apparent reference to Los Zetas. The threat was evidently directed against Blog del Narco, which runs graphic accounts and video clips of cartel war casualties, and Frontera al Rojo Vivo, a forum set up by Monterrey newspaper El Norte. Websites have taken up the slack as Mexico's "official" media have stopped aggressive coverage of the cartel wars in response to relentless threats and attacks against journalists. (NPR's The Two-Way blog, Houston Chronicle, Sept. 15; AFP, SDPnoticias, Sept. 14)