From Brietbart.com:

The recent fighting left the residents of the Mexican border cities of Matamoros and Reynosa on edge as large convoys of cartel gunmen raced down the city’s avenues to set up blockades on the main entrances into the respective cities. Over three days the blockades have sporadically exploded into fierce rolling gun battles with convoys of gunmen raining gunfire and explosives on their rivals.

The fighting has been so intense that both the U.S. Consulate in Matamoros and that city’s Mayor Leticia Salazar issued warnings to the public giving some of the locations of the fighting and advising residents to stay indoors.