- Armed police flooded Whitehall this afternoon and tackled a terror suspect 'armed with rucksack of knives'
- Pictures show man pinned against the floor with blades strewn across the pavement outside the Treasury
- Scotland Yard confirms man has been arrested on suspicion of possession of a knife and preparing terrorism
- The arrest was made as part of an ongoing operation and it is believed the man was already known to police
- Witnesses say a team of officers appeared 'like a swarm of bees' and the man did not resist as he was arrested
- It comes just 36 days after five people were killed in a terror attack by an Islamic extremist in the same area
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Armed police 'swarmed like bees' on a suspected terrorist with a rucksack 'full of knives' near Parliament Square this afternoon - after his concerned family alerted security services.
Just five weeks after the Westminster terror attack killed that five people, a team of officers swooped and arrested a bearded man dressed all in black shortly before 2:30pm.
Witnesses said the man, who was wearing a tracksuit and trainers, was crossing Whitehall amid the usual crowds of tourists and political staff when a police car suddenly pulled up and officers confronted him.
A large number of armed police then flooded the area as the suspect was pinned to the ground just yards from Downing Street. He was held against a wall of the Treasury before being taken away in a van to a police station.
Security sources say police were tipped off by the man's family, which may have allowed officers the chance to detain him opening fire.
Eyewitness Ian Grant was walking through the area when armed police rushed passed him and arrested the suspect.