Protests against Mexican local governments and federal president Enrique Peña Nieto showed no signs of letting up the week of Oct. 20, nearly one month after the Sept. 26-27 killing of six people and the abduction of 43 teachers' college students in Iguala in the southwestern state of Guerrero. Students held a two-day national strike on Oct. 22-23 to demand the return of the missing students, who were all from the Raúl Isidro Burgos Rural Teachers' College in the Guerrero town of Ayotzinapa. Tens of thousands of students and teachers marched in a total of 18 Mexican states on the first day of the strike. The protest in Mexico City was reportedly one of the capital's largest demonstrations in recent years. The Federal District (DF, Mexico City) police estimated the crowd at 50,000, while the Los Angeles Times reported that at one point the march stretched along the broad Paseo de la Reforma from the Angel of Independence to the central Zócalo, a distance of more than four kilometers.

On Oct. 3, authorities invaded the pueblo of El Reposo, in Campamento municipality of Colombia's Antioquia department, arresting three locals—including a minor and the president of the village Communal Action Junta—in connection with a supposed cocaine laboratory discovered nearby. But El Reposo's residents quickly turned the tables, rising up with their machetes, demanding that the three be liberated—and finally detaining 14 soldiers and six agents from the Fiscalía Technical Corps. The soliders and agents were held for several hours in the village schoolhouse. The government of Antioquia and Colombia's human rights ombudsman, the Defensoría del Pueblo, quickly mobilized a team to El Reposo to negotiate the release of the troops and agents. However, demands for the freedom of the three arrested locals remain outstanding, and the situation is still tense. (Semana, Bogotá, Oct. 3; Colombia Reports, La W Radio, BLU Radio,RCN, El Espectador, Bogotá, Oct. 3)

Two attacks in Egypt's Sinai Peninsula killed at least 30 troops Oct. 24. At least 27 people died in the first attack, a car-bomb blast at a checkpoint in the al-Kharouba area northwest of al-Arish, near the border with the Gaza Strip. Hours later, a gun-battle then broke out in al-Arish town, leaving another three dead. (Reuters, BBC News, Oct. 24) One day earlier, attackers inside Egypt fired an anti-tank missile and automatic rifles at a military vehicle in Israel, wounding two soldiers. The Israeli military has asked residents in the area to remain in their homes while an investigation is underway, and suggested the skirmish came as troops foiled a "violent drug smuggling attempt." (Al Jazeera, Oct. 23)

On Sept. 30, Peruvian President Ollanta Humala and his Colombian counterpart Juan Manuel Santos and their respective cabinet ministers held a rare joint meeting in Peru's Amazon river port of Iquitos. There, they signed a binational accord to launch a joint effort to "cleanse Putumayo"—a reference to the jungle river basin that has for many years been under the virtual control of criminal enterprises. The Río Putumayo, a tributary of the Amazon, forms the border between the two countries in the lawless region. The Colombian side is a key stronghold of the FARC guerillas, which is believed to do business with the criminal gangs that operate freely on the Peruvian side. Santos said "we have common enemies, such as the narco-traffic, illegal mining and cutting of forests." (El Tiempo, Sept. 30) He did not mention that efforts at cooperation to get the Putumayo under control have been hampered by an ongoing border dispute in the area.

Mexican authorities on Oct. 1 claimed another coup against the cartels, announcing the arrest of Héctor Beltran Leyva, last remaining kingpin of the Beltran Leyva Organization—the declining crime machine that once controlled much of the west and central parts of the country. Beltran Leyva was taken into custody by army troops "without a shot fired" as he dined in a seafood restaurant in the tourist town of San Miguel de Allende, Guanajuato state. (LAT, Oct. 1) The capture follows that earlier this year of the Sinaloa Cartel's long-fugitive jefe máximo Joaquin Guzmán Loera AKA "El Chapo"—marking another score for President Enrique Peña Nieto, and his supposed new and more sophisticated policy against the cartels.

Tens of thousands of people demonstrated in Mexico and internationally on Oct. 8 to protest the killing of six people and the wounding of at least 20 more the night of Sept. 26-27 by municipal police and people in civilian dress in the city of Iguala in the southwestern state of Guerrero. The demonstrators demanded the return of 43 students who have been missing since that night; all are from the militant Raúl Isidro Burgos Rural Teachers’ College in the town of Ayotzinapa. "They were taken alive, we want them back alive" and "We are all Ayotzinapa" were among the slogans protesters chanted in at least 25 Mexican states and 60 cities, including many in other countries, along with calls for the Guerrero state government and Mexico’s federal government to "go away.”

Gregorio Santos, the populist president of Peru's Cajamarca region, was comfortably re-elected Oct. 5—despite being imprisoned as corruption charges are pending against him. The biggest issue in the race by far was the unpopular Conga gold mine project, majority-owned by US-based Newmont Mining. Peru's central government said it would recognize the victory, while his supporters marched in Lima to demand his freedom. Environment Minister Manuel Pulgar-Vidal called for a "political dialogue with all the actors" to resolve the crisis in Cajamarca. But Jorge Vergara Quiroz, president of the Cajamarca Chamber of Commerce, said that Santos' re-election created a climate of "uncertainty" that would discourage investment, and called on him not to take office. Segundo Mendoza, spokesman for Santos' Social Affirmation Movement (MAS), responded that the party respects private investment. He called on authorities to free Santos, saying he posed no flight risk.

On Oct. 4 authorities in the southwestern state of Guerrero announced that they had found charred human remains in a group of mass graves in Iguala de La Independencia municipality, at Pueblo Viejo community in the countryside northwest of the city. Guerrero chief prosecutor Iñaky Blanco Cabrera would only say that there were human bones and that specialists would need to use DNA tests to identify the victims. State police agents at the site on Oct. 4 told reporters off the record that there could be anywhere from four to 19 bodies, but on Oct. 5 Blanco Cabrera said the total number was 28. It seemed likely that the remains were of teachers' college students missing since the night of Sept. 26-27, when Iguala police opened fire on three buses carrying students from the militant Raúl Isidro Burgos Rural Teachers' College, located in the town of Ayotzinapa. Originally 25 students were reported missing after the incident, but parents and student leaders later raised the number to 43.