EFE – Soldiers killed six gunmen in a shootout in Matamoros. The gunmen attacked the army troops on Saturday. The Gulf and Los Zetas drug cartels have been fighting for control of Tamaulipas and smuggling routes into the United States for years.

http://latino.foxnews.com/latino/politics/2015/06/21/soldiers-kill-6-gunmen-in-shootout-in-mexico/