El Universal's editorial page, among many others, had a strong reaction to the event in today's paper:
The tyranny of the Zetas in the North and the anarchy in the South [along immigration routes] was well known. The alarming things isn't just the massacre, but the incapacity of the state to anticipate it, not to mention formulate some answer.
For years, the northern border in has demonstrated itself untamable because of the violence and social decomposition, but the southern border, quieter until now, turns out to be as or even more decayed. We would do wrong in forgetting again.