Gaurdian | The body of an official investigating the massacre of 72 Central and South American migrants killed in a ranch in the northeastern Mexican state of Tamaulipas was found today dumped beside a nearby road alongside another unidentified victim, according to local media.

Earlier, two cars exploded outside the studios of the national TV network Televisa in the state capital, Ciudad Victoria. There were no casualties, but the blasts added to a growing sense of fear in the aftermath of the worst single act of violence in the country’s raging drug wars.

Meanwhile, investigators under armed guard continued the process of identifying the victims, with 20 named by midday on Friday, local officials said.

The migrants, 14 of them women, came from at least four countries, including Honduras, El Salvador, Brazil and Ecuador. They were found bound and blindfolded by the wall of a barn after navy personnel stormed the ranch on Tuesday.

The massacre was discovered after an Ecuadorian migrant, who had been left for dead with a neck wound, escaped. Luis Freddy Lala Pomavilla, 18, found his way to a navy road checkpoint.

He said the migrants had been kidnapped by armed men who identified themselves as belonging to the Zetas, one of the cartels fighting for supremacy in the state. He said the killing began after they refused offers to work for the cartel.