Per @metpoliceuk

Police were called at 1:58pm to a stabbing at premises near to London Bridge.

Emergency services attended, including officers from the Met and @CoLP

A man has been detained by police. We believe a number of people have been injured. Further info to follow. https://twitter.com/LauraWalkerKC/status/1200424172905750529
https://twitter.com/Ldn_Ambulance/status/1200425881245769733
There are witness reports this incident stemmed from a fight between some men in the area, which indicates it is not a terrorist attack. Keep in mind initial reports can be wrong and the response will treat a major incident as a terror attack out of caution.
Reminder, in 2017 London Bridge was the scene of a terror attack involving three assailants who drove van into pedestrians and then used knives to attack innocent people in the crowds.
This appears to be video of the current incident involving a civilian man fighting with another civilian man who is the suspected assailant with the knife https://twitter.com/CrimeLdn/status/1200422834427830273
The BBC's John McManus, who was at the scene of the incident when it occurred, said he saw a group of men fighting on the bridge. Police then arrived and shots were fired. Other witnesses say three officers were the first on the scene and shot the suspect.
Station staff at Monument confirmed five people have been injured in the attack.

The tube station has been closed off as armed police investigate. h/t @guardian
There is a jackknifed white lorry (truck) that may or may not be related to the incident on the London Bridge. Police are inspecting it now. Reminder that in 2017 a terror attack involved a white van & assailants with knives.
Video on BBC right now shows more fully civilians in a group jumping and holding down the assailant. One man clearly takes a knife away from the dogpile. Police arrive and pull civilians off. Suspect reportedly had some sort of vest on - potentially a suicide vest or dummy.
Here is the more full video of the current incident (warning, shots fired in vid). You can clearly see a civilian on the left remove a knife from the dogpile. Police arrive, clear civilians, shoot the assailant https://twitter.com/petecass123/status/1200440639768465408
The witness reports that the assailant was wearing some sort of suicide vest are confirmed by @metpoliceuk which explains why when the last civilian who restrained the assailant was safe the police immediately shot the assailant. The vest is likely a hoax vest. Will update.
Also https://twitter.com/LauraWalkerKC/status/1200444255136817153
There are reports a number of people were injured/stabbed before the assailant was taken down. No news yet on the condition of those victims.
On why the terrorist was immediately shot https://twitter.com/LauraWalkerKC/status/1200456877118803970
Per @metpoliceuk Two victims of the knife attack at London Bridge have died. Terrible news :(
You can follow @LauraWalkerKC.
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