Police in Mexico are investigating whether the bodies of 72 people found murdered were those of illegal migrants. <br /><br />The war between various drug gangs and security forces has been notoriously bloody, but this massacre seems particularly gruesome. <br /><br />The bodies were found piled on a property about 150-kilometres from the Texan border. <br /><br />A lone survivor says the dead were migrants heading for the US, apparently killed for refusing to pay off a drug gang.<br /><br />Al Jazeera's Mariana Sanchez reports from Mexico City.
