Just south of Mexico is a country named Belize where SAS and other troops play patacake with guatamala in the range of mountains the crosses guatamala, Mexio and Belize. This area is also a prime drug transhipment point. Now these guys were just noth of chiapas which is having a problem at the moment with the central government. Mexico is right to be suspicious. Although they are probably just tourists.
thanx,
bill