Shady Grove Adventist Hospital was shut down for a short time Saturday night, after they received threats against staff members.
Police say the Rockville hospital went into what they call "mini-disaster alert" around 8 p.m, and no one was allowed to enter the hospital.
Hospital staff say they received a call from a man who made threats against them, and called the police.
The call was traced back to someone in Fairfax County, but police did not find a credible threat inside the hospital.
