Alberto Carrillo Fuentes, the brother of the leader of Mexico's Juarez drug cartel, was behind much of the violence in the states of Chihuahua and Sinaloa, federal security spokesman Eduardo Sanchez said.

The 46-year-old Carrillo Fuentes was arrested last Saturday during an operation staged by the Federal Police in Bucerias, a small beach resort town in the western state of Nayarit.

"The investigations conducted show that a good part of the violence generated in the states of Chihuahua and Sinaloa is linked to the activities of this individual," Sanchez said.

Carrillo Fuentes faces organized crime, drug, money laundering and firearms charges, the federal security spokesman said.

He is also suspected of belonging to a criminal organization based in the northern state of Chihuahua and was one of the 122 most-wanted individuals targeted for capture by the government, Sanchez said.

Alberto Carrillo Fuentes is the brother of Vicente Carrillo Fuentes, the top leader of the Juarez cartel, and Amado Carrillo Fuentes, who founded the criminal organization in 1993.

Amado Carrillo Fuentes, who was known as the "Lord of the Skies" for his fleet of aircraft, died in 1997 after undergoing plastic surgery to disguise his identity.

Amado's brother, Vicente, and his son, Vicente Carrillo Leyva, who was arrested in April 2009, took control of the cartel following the drug lord's death.

Mexican media have identified Alberto Carrillo Fuentes, known as "Betty la fea," as the leader of the "new Juarez cartel."

Asked whether authorities were dealing with one or more criminal organizations based in Ciudad Juarez, a border city in Chihuahua, Sanchez said the government focused on individuals and not on gangs.

"For us, the names they give their organizations are irrelevant," the federal security spokesman said.

Alejandro Arias Barrera, another Juarez cartel member, was arrested in a simultaneous operation in Zapopan, a city in the western state of Jalisco, Sanchez said.

The 37-year-old Arias Barrera, who is from Ciudad Cuauhtemoc, Chihuahua, is also on the list of 122 most-wanted men, the federal security spokesman said.

No shots were fired in either operation and the two suspects are being questioned by federal prosecutors, Sanchez said.

The Juarez cartel, one of Mexico's most violent criminal organizations, has been waging a war against the Sinaloa cartel that has left thousands of people dead in the past few years.

The cartel smuggles drugs and engages in other criminal activities from its base in Ciudad Juarez, located across the Rio Grande from El Paso, Texas. EFE