Scotland Yard confirms the man was shot with the electric shock weapon just before midday on Sunday.
A man has been Tasered and arrested outside Buckingham Palace.
A Metropolitan Police spokesman said the electric shock weapon was used on the man at 11.55am.
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Sky sources understand police used the weapon because of concerns for the man’s safety.
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 kitchen porter said: ‘I thought “Oh my God, I can’t believe it”. There must have been about 15 police officers on foot who surrounded him once he’d been tasered.
‘The police saw him really quickly and were obviously cautious. He was in his 40s I’d say and I think he had knives in both hands.
‘Everybody was standing back when it happened and people were actually quite calm, I think everyone was surprised.
‘They had to divert the procession away from him. I think he was making his way to the guards.’
Witness Grant Shepherd posted a video of the incident on YouTube after tweeting: ‘Crazy man with a knife to his throat just stopped the Changing of the Guard at Buckingham Palace.’
In the YouTube video, the man takes a series of swipes at an officer as the stun gun is fired.
But as it connects he falls to the ground watched by hundreds of tourists who had assembled to watch the changing of the guard and take photographs of the palace.
Witnesses said the band played on as the chaos unfolded. Mr Burrows added: ‘The man didn’t have the chance to get close to anyone as the police were right on him in seconds.’
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VIDEO Dramatic scenes outside Buckingham Palace (courtesy Grant Shepherd)
Originally posted here:
Buckingham Palace: Police taser man who was ‘holding knife to his throat’ during Changing of Guard