A 23-year-old German man is in custody after falsely claiming to have a bomb inside a suitcase he was trying to take into the US Embassy in Berlin.
The incident began at around 7.30am on Friday when the man was turned away at the door of the building near the landmark Brandenburg Gate by security personnel, police spokesman Jens Berger said.
The man then allegedly became violent and tried to punch security personnel, Mr Berger said.
As he was being arrested by Berlin police at the scene, Mr Berger said the man told them there was a bomb in his suitcase, which was in front of the entrance.
The area was quickly cleared and a police robot was brought in to open the bag, but found only "personal items" like clothes, police said.
Few details about the man were immediately available, but Mr Berger said "there are many indications he is psychologically disturbed".