Update 11.7.12 another confrontation last night, it follows the first post of the Monday conflict. Additionally reports of massive convoys of SEDENA and PFP into Piedras Negras.
Conflicting reports with respect to number of dead. Lowest tally is 4 narcos (Zetas) and 2 federal police killed. The highest number is 4 narcos and 6 federal police. This inability to report numbers that are reported uniformly is a frustration and happens throughout Mexico, but Coahuila is one of the worse offenders.
There was an attack on the headquarters of the Federal Police in Piedras Negras, Coahuila, which caused confrontations between elements of the ARMY/NAVY, and Federal Police against armed commandos in several locations of the city.