Top U.S. law enforcement officials on Monday described drug cartels that are increasingly mobile, tech savvy, diverse and transnational, factors that are challenging efforts to curb border violence fueled by big profits.

Modern organized crime organizations are "borderless", said FBI Director Robert S. Mueller III, who added that the FBI is "deeply concerned about high levels of drug trafficking, human smuggling and gang activity", as well as with the surge in violent crimes linked to the drug trade such as homicides, kidnappings and extortion.

Mueller was among the featured speakers at the two-day Border Security Conference at the University of Texas at El Paso, which continues Tuesday.

U.S. Rep. Silvestre Reyes, D-Texas, the conference host, said this year's themes are border protection and effective commerce.

Mueller said much of the increased violence in Juárez that has claimed hundreds of lives this year is related to two groups fighting over the corridor drug dealers use to introduce cocaine, marijuana, heroin and methamphetamines into the U.S.

The main factions vying for control of the Juárez-El Paso corridor are led by Carrillo Fuentes and Joaquin Chapo Guzman Loera.

U.S. law enforcement officials have detected Mexican drug cartels in nearly 200 U.S. cities and practically every state.
According to a United Nations report released last year, the Juárez cartel has a presence in more than 35 countries.


In relation to the text above, it can be said that

Fuentes and Chapo are both trying to control Juarez-El Paso corridor.