At least 26 are dead, 50 injured and seven still missing after a Sept. 18 explosion at a Petróleos Mexicanos  (Pemex) gas pipeline distribution center on the outskirts of Reynosa, on the Texas border in Tamaulipas state. The dead include four Pemex employees and 22 private contractors. The pipeline serves wells in northern Mexico's Burgos basin, which have been repeatedly attacked for pilfering by criminal gangs such as Los Zetas. Last month, Pemex said the amount of petroleum products stolen in the first half of this year is up 18% compared to 2011, totalling more than 1.8 million barrels. But the company denied that criminal activity was linked to the Reynosa blast. (Brownsville Herald, Sept. 19; OilPrice, Aug. 21)

Mexican naval forces in the oil port of Tampico, Tamaulipas, on Sept. 13 arrested Jorge Eduardo Costilla Sánchez AKA "El Coss"—notorious leader of the Gulf Cartel—along with five cohorts, apparently without resistance. Authorities hailed it as a major blow against the cartel, coming just a week after the arrest of another Gulf kingpin, Mario Cárdenas Guillén AKA "El Gordo" (Fatso), captured by Mexican marines in Altamira, also in Tamaulipas—the brother of Osiel Cárdenas Guillen, who led the cartel until he was detained in 2003.

The Mexican daily La Jornada reported on Sept. 6 that the US had granted political asylum to Mexican teacher Agustín Estrada Negrete, who claimed he had suffered persecution and torture from officials of México state because of his homosexuality. Estrada was removed from his post as a school principal after he had appeared in women’s clothes at a festival against homophobia in May 2007. Following a march demanding his reinstatement in 2009, México state police arrested Estrada in Toluca and took him to the La Palma prison, where he said he was beaten and gang-raped. He arrived in San Diego in September 2010 in a wheelchair to seek asylum.

The US State Department issued a finding Sept. 7 that former Mexican president Ernesto Zedillo, now teaching at Yale University in Connecticut, should be immune from a civil lawsuit brought against him in the US in connection with the 1997 massacre at Acteal hamlet in Mexico's conflicted southern state of Chiapas. "The complaint is predicated on former President Zedillo's actions as president, not private conduct," said Harold Hongju Koh, a State Department legal adviser and a professor at Yale Law School, also citing the complaint's "generalized allegations." The US Justice Department submitted the letter to federal District Court in Hartford, where a judge is to make the final determination. "We are extremely disappointed by the decision of the Department of State to grant immunity to the ex-president, which will prevent us from proceeding with the case against him," attorneys Roger Kobert and Marc Plugiese of the firm Rafferty, Kobert, Tenneholtz & Hess told Notmex news agency.

The Mexican daily La Jornada reported on Aug. 28 that the two US agents wounded in a shooting incident near Tres Marías in Morelos on Aug. 24 were from the Central Intelligence Agency (CIA), not the Drug Enforcement Administration (DEA). Citing unidentified "official sources close to the investigation," the newspaper also said the attack was carried out by five vehicles, not four, and that the shooting began after the assailants were able to see the victims close up. The agents were driving a heavily armored US embassy car, a Toyota Land Cruiser, on their way to a Navy training facility, apparently to provide instruction to marines involved in the "war on drugs." According to later reports, the US agents survived only because of the car's armor.

In an unusual and dramatic protest against lax gun control laws in the US, relatives of victims of drug-related violence in Mexico destroyed a .357 Magnum pistol and an AK-47 assault rifle in Houston's Guadalupe Plaza Park on Aug. 27 and buried the remains in cement. The protesters were part of a Caravan for Peace that started a month-long tour of the US in San Diego on Aug. 12 to raise awareness of the US role in a "drug war" that has cost some 50,000 lives in Mexico since the beginning of 2007. The tour is to end in Washington, DC on Sept. 12.

Mexico's 2012 presidential election came to a close on Aug. 31 when the Electoral Tribunal of the Judicial Branch of the Republic (TEPJF) officially declared former México state governor Enrique Peña Nieto the winner of the July 1 vote. One day earlier the tribunal had dismissed charges by the coalition backing center-left candidate Andrés Manuel López Obrador that Peña Nieto's 6.62% lead over López Obrador was the result of fraud, vote buying and media manipulation by Peña Nieto's centrist Institutional Revolutionary Party (PRI), Mexico's ruling party from 1929 to 2000. (La Jornada, Mexico, Aug. 31, Sept. 1)

A group of Mexican federal police agents attacked a US embassy car at around 8 am on Aug. 24 in the state of Morelos just of south of Mexico City, near the Mexico City-Cuernavaca highway. The police agents shot a number of times at the car, lightly wounding two US officials who were traveling with a member of the Mexican Navy to a nearby Navy training installation. The embassy car had diplomatic license plates, while the federal police were reportedly traveling in four unmarked vehicles.