MONTERREY, Mexico, April 21 The U.S. State Department has issued a travel advisory, warning Americans of possible drug violence in parts of Mexico, especially along the Texas border.The warning was issued after drug traffickers posted written death threats against government officials and their families -- attaching them with ice picks to the bodies of their murder victims -- The Dallas Morning News reported Saturday.Three bodies were found in the Monterrey area in the past month with messages accusing Nuevo Leon state authorities of favoring their rival cartel groups.One note read, "This won't end until you understand." A U.S. State Department official told the newspaper on condition of anonymity that "the environment has never been this tense. We have never seen our counterparts as worried about their personal safety as they are today." The travel advisory includes the popular resort area of Acapulco."U.S. citizens should make every attempt to travel on main roads during daylight hours," the State Department said, adding that U.S. citizens should exercise all due caution and remain vigilant while in Mexico. Copyright 2007 by UPI
