The Army is tightening restrictions on soldiers stationed at Fort Huachuca who want to travel to Mexico because of rising violence south of the border.
The nearly 7,000 troops based at the southern Arizona post now must receive permission from a top commander before traveling to Mexico.
Another 11,000 or so family members, civilian staffers and contractors at the fort are "strongly urged" not to visit Mexican cities such as Naco, Agua Prieta and Nogales.
The Army can't legally stop family members and civilian workers from visiting Mexico, but it is warning them not to do so for their own safety.
The post is about 75 miles southeast of Tucson and less than 20 miles from Mexico.
