3:55PM UPDATE: An employee informed me that the location was closed due to a hot water tank needing repair. They may re-open as early as later today.
Taco Bar in Rio (10003 Fields Rd.) has been closed by the MoCo Department of Health and Human Services.
The sign was placed there today and states that the restaurant will remain closed until further notice. The Beer & Wine portion of the store remains open.
Taco Bar has a second Gaithersburg location at 3 Russell Avenue that remains open.