Recent captures or killings of top Mexican drug cartel leaders:
— Feb. 27, 2015: Authorities say federal police capture Servando "La Tuta" Gomez, one of the world's most-wanted drug lords who once terrorized Michoacan state as leader of the Knights Templar cartel.
— Oct. 9, 2014: Mexican officials announce the arrest of Vicente Carrillo Fuentes, purported leader of the Juarez cartel.
— Oct. 1, 2014: Mexico announces the capture of Hector Beltran Leyva, alias "The H" and "The Engineer," who allegedly became head of the Beltran Leyva cartel after his brother Arturo was killed in a gun battle with troops in 2009.
— March 9, 2014: Mexican soldiers kill Nazario Moreno Gonzalez, leader of the La Familia Michoacana and later the Knights Templar cartel, while riding a mule in the remote Michoacan mountains. The government had previously claimed that he was killed in December 2010, but never produced a body.
— Feb. 22, 2014: Authorities say Mexican and U.S. officials capture the world's most powerful drug lord, Joaquin "El Chapo" Guzman, in the beach resort of Mazatlan.
—July 15, 2013: Authorities in northern Mexico capture Miguel Angel Trevino Morales, alias "Z-40," leader of the Zetas cartel.
—Oct. 7, 2012: Mexican marines kill Heriberto Lazcano Lazcano, a founder and top leader of the Zetas. His body later is stolen from a funeral home. Trevino Morales takes over the Zetas.
—Oct. 6, 2012: Mexican marines arrest alleged Zetas regional leader Salvador Alfonso Martinez Escobedo, suspected of involvement in massacres and the killing of U.S. citizen David Hartley in 2010 on Falcon Lake, which straddles the U.S.-Mexico border.
—Sept. 12, 2012: Mexican marines capture purported top Gulf Cartel leader Jorge Eduardo Costilla Sanchez, alias "El Coss." U.S. authorities had offered a $5 million reward for his arrest.
—July 29, 2010: Mexican army raids a house in the town of Zapopan and kills Ignacio "Nacho" Coronel, one of the top leaders of the Sinaloa Cartel.
—Dec. 16, 2009: Mexican marines kill Arturo Beltran Leyva, leader of the Beltran Leyva cartel, in a shootout in Cuernavaca.