A man arrested on suspicion of possessing a firearm, specifically a taser, at Buckingham Palace has been released without further action.
The 38-year-old tourist from the Netherlands was detained by security staff at the visitors’ entrance to the royal residence on Sunday afternoon.
However on Monday morning, Scotland Yard confirmed his release, stating that the device was low-powered and part of a keyring.
A spokesman said: “Officers are reminding visitors to the United Kingdom to ensure that any items that they are carrying comply with legislation in the UK.
“This includes small knives and personal Taser-type devices, both of which may be considered offensive weapons or in breach of strict UK firearms laws.”
The man had been taken into custody at a central London police station.
Police added that his possession of the device was a genuine error and he posed no threat.
Buckingham Palace declined to comment on the incident, at the time.
The Queen is currently at Balmoral Castle in Scotland on her summer break.