As Mexico has aggressively militarized its "drug war" over the past years, the nation's capital has been an exception, with authorities reluctant to send soliders to patrol the seat of federal power—until now. Over 1,000 army troops have been mobilized to the streets of Nezahualcóyotl, a suburb of Mexico City, just south of the Federal District line in México state, which has seen a dramatic increase of violence in the past weeks. The México state Prosecutor General says 119 assassinations have been registered so far this year, mostly in Nezahualcóyotl. The decision to send in army troops—under a program dubbed "Operation Neza"—was apparently sparked by the Sept. 16 stabbing death of México state lawmaker Jaime Serrano Cedillo of the Institutional Revolutionary Party (PRI). Although subsequent reports have indicated he was killed by his wife in a domestic dispute, Serrano was the second PRI politician killed in as many days last week. On Sept. 15, Eduardo Castro Luque, newly elected to the Sonora state legislature, was shot full of nine bullets in front of his home in Ciudad Obregón. The twin slayings came when the country was on high alert for Independence Day celebrations, with extra troops deployed to conflicted states to head off terror attacks on the festivities. The PRI, a once-entrenched political machine, returns to power after 12 years in opposition, when president-elect Enrique Peña Nieto takes office in December. (LAT, AP, Sept. 21; WSJ, El País, Spain, Sept. 20; EFE, AP, La Jornada, Sept. 15)

Authorities from four countries cooperated in a months-long operation that led to the arrest Sept. 18 of Daniel Barrera AKA "El Loco"—dubbed the "last of the great capos" by Colombia's President Manuel Santos—on a street in San Cristóbal, a town in Venezuela's western Táchira state. Barrera was apprehended while making a call from a phone booth, allegedly after one of his relatives had given up his location. The arrest followed four months of cooperation between Colombia's National Police, the US Central Intelligence Agency (CIA), the UK's MI6 and Venezuela's National Anti-Drug Office (ONA). According to Colombia's defense minister, Juan Carlos Pinzón, the kingpin had been in Venezuela for the past eight months and was running his business while moving between several towns near the Colombian border.

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)

Peru's National Police Anti-Drug Directorate (DIRANDRO) claimed a blow against the resurgent Sendero Luminoso guerillas after intercepting a plane loaded with 350 kilograms (770 pounds) of cocaine in plastic-wrapped bricks when it landed at a clandestine airstrip in a jungle area of Oxapampa province, Pasco region, Sept. 18. The crew of the Bolivian-registered Cessna put up armed resistance before fleeing into the jungle. A manhunt to apprehend them is now underway. DIRANDRO said the cocaine  originated in the Apurímac-Ene-Mantaro River Valley (VRAEM), a jungle zone just south of Oxapampa where the "narcosenderista" brothers Víctor, Jorge and Martín Quispe Palomino—known by the respective code-names  "José," "'Raúl" and "Gabriel"—are said to control coca production. The cocaine was believed to have been brought to Oxapampa by back-pack along jungle trails, and was to be flown to Bolivia for re-export to Brazil in an operation overseen by wanted Bolivian kingpin William Rosales. (RIA-Novosti, La Republica, InfoSur Hoy, Peruvian Times, Reuters, Sept. 18)

For a fourth year running, the White House narcotics "blacklist" (officially the Presidential Determination on Major Illicit Drug Transit and Drug Producing Countries, released Sept. 14) named Venezuela and Bolivia as nations that have "failed demonstrably" to fight the drug trade, making them ineligible for US aid. Caracas and La Paz struck back angrily to the announcement. "Venezuela deplores the United States government's insistence on undermining bilateral relations by publishing this kind of document, with no respect for the sovereignty and dignity of the Venezuelan people," Venezuela's Foreign Ministry said, accusing Washington of a "permanent line of aggression against independent sovereign governments." Bolivian President Evo Morales said in a speech in the Andean region of Oruro: "The United States has no morality, authority or ethics that would allow it to speak about the war on drugs. Do you know why? Because the biggest market for cocaine and other drugs is the United States. They should tell us by what percentage they have reduced the internal market. The internal market keeps growing and in some states of the United States they're even legalizing the sale of cocaine under medical control." (EFE, Sept. 15)

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.

Colombia's President Juan Manuel Santos announced Sept. 4 that his government and the FARC guerrilla organization have signed an agreement to start peace negotiations. In a televised speech, Santos said the talks will consist of three phases. In phase one, which has been concluded, "we defined a closed agenda, rules and procedures to move forward," Santos said. The second phase, to begin now, "will be a discussion, without interruptions and without intermediaries, about agreed points to reach the final agreement." The third, post-conflict phase will consist of "the simultaneous implementation of all agreements, with the appropriate safeguards, verification mechanisms and citizen participation." Five points for the talks have been outlined: rural development, guarantees for political participation, an immediate end of the armed conflict, drug trafficking, and victims' rights. Santos said these points "constitute an integral formula for the effective termination of the conflict and to advance the construction of a stable and lasting peace."

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.