MEXICO CITY -- Mexico's army has detained 10 of its own officers for allegedly accepting payments from a drug cartel to give it tip-offs about government operations against drug gangs.

A captain and seven lieutenants were among those held in Friday's operation, the Mexican attorney general's office said Monday. Authorities believe the men were being paid by the so-called Sinaloa cartel, led by a gang of drug lords that includes Joaquín "El Chapo" Guzmán Loera, Mexico's most wanted man, and Ismael "El Mayo" Zambada,...