By Allan Lengel
ticklethewire.com
The drug war in Mexico just got more complicated.
The Associated Press reports that the Gulf and La Familia drug cartels in Mexico, which were bitter rivals, have joined forces in the Mexican border state of Tamaulipas to try and eliminate a gang of hitmen known as the Zetas gang.
The effort has raised concerns of even more violence in an already very violent environment, AP reported.
The Zetas gang was once the enforcement arm of the Gulf cartel.
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