Gulf Cartel executing Zetas.
More info here.. http://www.borderlandbeat.com/2011/09/35-zetas-executed-in-boca-del-rio.html
Seems to be gang vs gang violence.
The sign says:
“This will happen to all the Zeta sh!t that stay in Veracruz, the plaza has a new owner...G.N. (Gente Nueva). Here is el ferras and his royal court”
I think the Zetas are one of the bigger crime cartels in Mexico. Some of the dead are recent prison escapees.
Gonna get ugly.