A suspected Sinaloa cartel boss arrested this week is suspected in the deaths of more than 350 people, Mexican federal security spokesman Eduardo Sanchez said.

Mario Nuñez Meza, alias "M10," is a suspect in at least 30 separate investigations and faces decades in prison if convicted, Sanchez told a press conference.

The reputed Sinaloa cartel operative was arrested early Wednesday at a hotel in Ciudad Juarez, located across the Rio Grande from El Paso, Texas.

Authorities captured Nuñez Meza without firing a shot in a "well-planned" operation made possible by a tip from the public and good intelligence work, the government spokesman said.

Nuñez Meza "is probably responsible for the homicide of more than 350 people found in 23 clandestine graves in the (northwestern) state of Durango," Sanchez said.

The suspect is also connected to the slayings of two federal agents in Durango and to the murders of three investigators working for the Chihuahua state Attorney General's Office, the spokesman said.

Police seized a machine gun, a computer and four mobile phones from Nuñez Meza.

Led by Joaquin "El Chapo" (Shorty) Guzman, the Sinaloa outfit is the longest-standing and most powerful drug cartel in Mexico.

Guzman, who escaped from prison in January 2001, is one of the most-wanted criminals in Mexico and the United States, where the Drug Enforcement Administration has offered a reward of $5 million for him.

The Sinaloa cartel, according to intelligence agencies, is a transnational business empire that operates in the United States, Western Europe, Eastern Europe, the Americas and Asia. EFE