beheadings of twelve people in southern Mexico were probably the work of the powerful Gulf cartel based across the border from Texas, a state governor said on Friday.Eleven beheaded bodies with signs of torture were dumped outside the city of Merida in the Yucatan Peninsula on Thursday. A 12th beheaded body was found 50 miles away in a small town to the east of Merida, also showing signs of torture. "This seems to be the work of the Gulf cartel," Yucatan Gov. Ivonne Ortega told reporters, adding that she had received several threats from suspected drug gangs over the past three months.Authorities say the cartel controls drug smuggling in seven states along the Gulf of Mexico from southern Mexico into Texas."We will have to see where the heads turn up. I am sure they will try something spectacular to shock society," she said.Three armed men were arrested on Friday after ignoring instructions to stop at a police checkpoint on the road between Merida and the popular Ca...