Not hearing anything yet of this in the news am kind of skeptical to the validity of this report.
In any case, a perfect example of my post on 9/18 suggesting that all be sure to mark the outside of their cache container.
I actually had a cacher who was searching for one of mine (Redwings Treasure) park in a residential area no where near the cache and enter the park from it was in from the back side.
Residents called the police saying they saw him and his partner get out of the car and enter the wooded area with a gun. They were waiting when he returned to his car only to find out the supposed gun he was holding was his GPS.
I'd like to point out that this happened prior to the 9/11/01 attacks. Some people just panic easily and it will only get worse now.