The Drug Enforcement Administration on Monday announced the launch of Gatekeeper, a binational collaboration to identify Mexican cartel leaders in smuggling corridors along the Southwest border.

MEXICO CITY -- Hours after the U.S. Drug Enforcement Administration announced “a major new initiative” for United States and Mexico collaboration targeting gatekeepers who control illicit trafficking routes across the countries’ shared borders, Mexico’s president said Tuesday there was no such agreement.

Drug Enforcement Administration officials plan to work with their counterparts in Mexico to target the gatekeepers of the smuggling corridors between the two nations. The effort is called Project Portero.