Due to the Gulf Cartel's territory in northern Tamaulipas, primarily in the border cities of Reynosa and Matamoros, they have been able to establish a sophisticated and extensive drug trafficking and distribution network along the U.S.–Mexico border in South Texas. The Mexican drug cartels that operate in the area are currently employing gang members to distribute drugs and conduct other criminal activities on their behalf. Among these gangs, that range from street gangs to prison gangs, are the Texas Syndicate, the Latin Kings, the Mexican Mafia, the Tango Blast (Vallucos), the Hermandad de Pistoleros Latinos, and the Tri-City Bombers—all based in the Rio Grande Valley and Webb County, Texas.