Two rescued, two dead in the incident.

This is fascinating:

“The gunmen herded the four U.S. citizens into another vehicle and fled,” the embassy said.

The Americans were not directly targeted, Attorney General of Tamaulipas, Irving Barrios, said at a news conference.

It “seems to be that it was a misunderstanding,” Barrios said.

Mexican investigators believe the kidnappers may have wrongly believed the Americans were rival human traffickers, a source close to the investigation told ABC News.

Also… lol…

One of the survivors, McGee, is a mother of five who traveled from South Carolina to Mexico for a cosmetic medical procedure.