Office of the Arizona Governor Doug Ducey

Arizona Gov. Doug Ducey surveys shipping containers used to close gaps in the border wall near Yuma on Sept. 8, 2022.

The U.S. Forest Service issued a warning to visitors coming to the Coronado National Forest in southeastern Arizona.

Officials say the presence of unauthorized shipping containers set up by Arizona may create a safety hazard for the public entering the Sierra Vista Ranger District.

In August, Gov. Doug Ducey issued a controversial executive order to have shipping containers placed in gaps along the border wall. Environmentalists, the federal government and others previously voiced their concerns about the decision.