Suspected Zeta gang leader Gregorio Sauceda Gamboa, One of Mexico's 24 most-wanted drug traffickers.

Suspected Zeta gang leader Gregorio Sauceda Gamboa, One of Mexico's 24 most-wanted drug traffickers.Federal police say Sauceda Gamboa was detained in the border city of Matamoros, across the border from Brownsville, Texas.Sauceda Gamboa appears on a list of 24 alleged drug traffickers published by prosecutors in March. Authorities have offered rewards of up to $2.1 million for each suspect.Police said Wednesday that they also seized five rifles and more than 4,500 rounds of ammunition in the raid that netted Sauceda Gamboa.The Zetas are a violent drug gang based in the states along Mexico's Gulf coast, and have been involved in many of the killings that have taken more than 10,650 lives since 2006.