Mexican military patrols were on the lookout Tuesday for a group of Zeta gunmen that had entered Matamoros with plans to carry out several attacks. Locals reported seeing the military convoys, which were larger and more heavily armed than usual, patrol the city keeping an eye on high-profile vehicles. A source with firsthand knowledge of criminal activity in Tamaulipas stated that a group of approximately 50 Zetas were able to enter the city and hide amid the confusion of the weekend fighting between the Zetas, the Gulf Cartel and the Mexican military. On Monday afternoon, the source confirmed a clash...