A man's been tasered by police outside Buckingham Palace.
It happened just before noon today.
The Queen and Prince Philip were at Sandringham at the time of the incident.
A Buckingham Palace spokeswoman said they would not comment as it was a police matter.
The scene was cordoned off with police tape 30 metres from the palace gates.
Inside the cordoned-off area lay two knives with six-inch blades and a pair of Nike high top trainers.
Taser wire also lay on the ground.
Some viewers may find this video upsetting
YouTube video. Warning: contains footage some viewers may find upsetting.