At least 15 were killed April 10 in a series of confrontations in Mexico's increasingly conflicted Michoacán state. The first confrontation began when federal police aboard a helicopter spotted armed men traveling in four vehicles at Charapando in the muncipality of Gabriel Zamora. The gunmen opened fire on the agents, who shot back and killed five, a police statement said, adding that one of those killed was high in the leadership structure of a local drug cartel, which was not named. Two police agents were reported wounded. Hours later in the town of Apatzingan, federal agents were accompanying a procession commemorating the anniversary of the death of Mexican revolutionary Emiliano Zapata when gunmen opened fire with AK-47s. Police returned fire, killing one. Another eight were killed elsewhere in Apatzingán, when gunmen attacked a police checkpoint where trucks full of harvested lime were backed up; two police were injured, but the dead were all civilians. Schools in Apatzingán and Buenavista Tomatlán municipalities have been closed due to the violence.

Seven were killed March 29 when a masked gunman in a bullet-proof vest and black uniform opened fire with an AK-47 in a bar in in the commercial center of Chihuahua City in northern Mexico. Three of the dead were women who worked at the bar, called Mogavi. The city has seen a wave of violence as the Juárez Cartel and Sinaloa Cartel battle for control of the strategic corridor leading to the border town of Ciudad Juárez, immediately up the highway to the north. In a similar incident that night, gunmen opened fire in a bar in Ciudad Altamirano, Guerrero state, killing four civilians and three off-duty federal agents. The previous night, an armed commando raided a nightclub called La Habana in Oaxaca City, in Mexico's south, menacing staff and patrons with AK-47s, shooting up the bar's facade, and abducting one man identified only by his nickname, "El Chiquilín."

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.