Two flash grenades were discovered by an airport cleaning crew in a men's room at Reagan National Airport. The men's room, located in the C Concourse, is just outside airport security. From The Washington Post:

A cleaning crew at Reagan National Airport found two nonlethal munitions Friday in a trash can of a men's room in the C concourse at the north end of the terminal.

Airport police contacted an explosive ordnance disposal unit, which determined that the devices, known as flash grenades, were designed to produce only noise and smoke, airport spokesman Rob Yingling said. The findings did not disrupt airport operations, Yingling said. The men's room, near the ticketing concourse, is outside airport security.

Airport police and FBI are investigating.