Eleven tourists, all apparently Mexican citizens, were killed in a bus crash Monday on a highway south of the resort town of Tulum. Authorities said eight women, two men and a 2-month-old baby died when the bus flipped on the grass on the side of the highway in Mexico's Caribbean coast state of Quintana Roo. Several other passengers were injured. The cause was still under investigation. The state detectives' agency said the bus driver had not been located and might have fled. The bus was carrying tourists from Mexico's Gulf coast state of Veracruz to the resort of Cancun.