Recent captures or killings of top Mexican drug cartel leaders:

— Feb. 27, 2015: Federal police capture Servando "La Tuta" Gomez, one of world's most-wanted drug lords who once terrorized Michoacan state as leader of Knights Templar cartel.

— Oct. 9, 2014: Officials announce arrest of Vicente Carrillo Fuentes, purported leader of Juarez cartel.

— Oct. 1, 2014: Mexico announces capture of Hector Beltran Leyva, alias "The H" and "The Engineer," who allegedly became head of Beltran Leyva cartel after his brother Arturo died in 2009 gunbattle with troops.

— March 9, 2014: Soldiers kill Nazario Moreno Gonzalez, leader of La Familia Michoacana and later Knights Templar, while riding mule in remote Michoacan mountains. Government had wrongly claimed that he was killed in December 2010.

— Feb. 22, 2014: Authorities say Mexican and U.S. officials capture world's most powerful drug lord, Joaquin "El Chapo" Guzman of Sinaloa Cartel, in beach resort of Mazatlan.

—July 15, 2013: Officials in northern Mexico capture Miguel Angel Trevino Morales, alias "Z-40," leader of Zetas cartel.

—Oct. 7, 2012: Marines kill Heriberto Lazcano Lazcano, founder and top leader of Zetas. His body later stolen from funeral home.

—Oct. 6, 2012: Troops arrest alleged Zetas regional leader Salvador Alfonso Martinez Escobedo, suspected of involvement in massacres and killing of U.S. citizen David Hartley in 2010 on Falcon Lake straddling U.S.-Mexico border.

—Sept. 12, 2012: Marines capture purported top Gulf Cartel leader Jorge Eduardo Costilla Sanchez, alias "El Coss."

—July 29, 2010: Soldiers raid house in town of Zapopan and kill Ignacio "Nacho" Coronel, a top leader of Sinaloa Cartel.

—Dec. 16, 2009: Marines kill Arturo Beltran Leyva, leader of Beltran Leyva cartel, in shootout in Cuernavaca.