Antonio Cardenas Guillen , Jorge Eduardo Costilla and Heriberto Lazcano , for drug trafficking related crimes , all believed to be at large in Mexico . U.S. authorities ratchet up the pressure on Mexico 's notorious Gulf Cartel . The Mexican government has been under increasing international scrutiny for its handling of organized crime in recent years, and it is now facing a growing number of criminal indictments that could lead to more severe penalties against top Plan to disrupt cartel : ` ` Prosecute their leaders and seize their funding '' Enforcement arm of cartel is known as Los Zetas ; cartel operates in U.S. cities .
U.S. authorities ratchet up the pressure on Mexico 's notorious Gulf Cartel . The Mexican government has been under increasing international scrutiny for its handling of organized crime in recent years, and it is now facing a growing number of criminal indictments that could lead to more severe penalties against top Plan to disrupt cartel : ` ` Prosecute their leaders and seize their funding '' Enforcement arm of cartel is known as Los Zetas ; cartel operates in U.S. cities .