In an e-mail sent around Tuesday morning and published online by Stars and Stripes, troops at the Kleber Kaserne were told thanks for the vigilance, but no thanks.
The e-mail tells troops to "please stop calling the German police, military police, and hiding in your buildings."
U.S. Army Garrison Kaiserslautern spokesman Mark Heeter confirms the validity of the e-mail, saying the role players are part of a force protection exercise.