The authorities have closed off Dag Hammarskjölds Allé in the Copenhagen district of Østerbro amid reports that a suspicious object has been found at the US Embassy.
Police officers, fire-fighters, a bomb disposal unit and several ambulances have been present at the scene for just over an hour.
Suspicious looking bottle
Eye-witnesses report the use of a Rulle Marie robot that might have retrieved a suspicious looking bottle, which had been wrapped in duct tape, near the main entrance of the building.
The embassy was quickly evacuated, and a man from the fire department used a megaphone to warn residents to stay away from windows.