An FBI spokesperson confirmed a hotel guest was “mistakenly” detained during the exercise. According to a police report, the pilot was in a room on the 15th floor.

The incident occurred at approximately 10 p.m. inside the Revere Hotel on Stuart Street in Boston, where FBI spokesperson Kristen Setera said the FBI Boston Division and U.S. Department of Defense were cooperating on a training exercise.

In a statement, U.S. Army Lt. Col. César Santiago said the Department of Defense routinely conducts training exercises with law enforcement agencies, and he referred 5 Investigates to the U.S. Army Special Operations Command public affairs office for more information about the incident.

[What in the world …? Can we assume that everyone involved in this “training exercise” failed it? Spectacularly? And what is the Department of Defense doing with its involvement in domestic law enforcement and counter-terror operations? This should be under the civilian Department of Homeland Security and/or the Department of Justice, not the DoD. — Ed]