The Mexican navy's marine corps has killed one major cartel boss and captured four other alleged top drug traffickers in just over a month:
— Oct. 7: Marines kill a man whose fingerprints they say match those of Heriberto Lazcano, alias "El Lazca," a founder and top leader of the brutal Zetas drug cartel.
— Oct. 6: 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. 27: Marines detain Ivan Velazquez Caballero, alias "El Taliban," believed to be the leader of a breakaway faction of the Zetas.
— Sept. 12: 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.
— Sept. 4: Marines detain Mario Cardenas Guillen, an alleged leader of the Gulf cartel and the brother of the cartel's former boss, Osiel Cardenas Guillen, currently jailed in the United States.