One of the most violent days recently in northern Tamaulipas took place Tuesday as one large firefight broke out in Matamoros, another firefight took place in Rio Bravo, and various grenade attacks occurred in Reynosa, Ciudad Victoria and Rio Bravo. In Matamoros, fighting broke out about 5 p.m. near the intersection of Cuauhtémoc Avenue and Calle Doce. Soon after, another fight broke out along Calle Sexta near the intersection with Canales Avenue. The fighting soon moved to the San Francisco neighborhood, where it reportedly lasted close to 30 minutes. The fighting allegedly took place between two groups of gunmen, with...