Rowley said police believe there were only three attackers.
After one of the men was shot, Sciotto captured a photo of the suspect on the ground wearing what appeared to be canisters.
The white van then continued to drive to Borough Market.
"As you know, our officers confronted the suspects and brought this awful incident to a conclusion within eight minutes".
At least two people have died after being after reportedly being struck by a van on London Bridge on Saturday night.
Do you notice we are not having a gun debate right now?
Saturday's van and knife assault is the latest in a string of attacks to hit Europe, including in Paris, Berlin and Saint Petersburg, and the French, German and Russian leaders sent their condolences and messages of support. We don't believe there is, but we must make absolutely certain of that. The terrorists were confronted and shot by armed officers within 8 minutes of the police receiving the first emergency call.
Authorities were already on high alert following other recent attacks.
"So, we were prepared potentially for an incident as we have been for some considerable time". No matter what the terrorists do, they will not win.More news: Putin suggests US hackers could have interfered with election, blamed Russia
"In my view, we responded extremely well.to this ghastly, ghastly incident".
"We will be working with the Government, and with our colleagues in the intelligence services to do so".
He said the pub was then closed and armed police told them to leave the area.
"Searches of a number of addresses in Barking are continuing".
The US embassy in London tweeted: "Please avoid the area and monitor local news/@metpoliceuk for updates". "Our thoughts are with those who are caught up in these terrible events". "It's clear to me that the courage of those people during and following the attack was extraordinary and I pay tribute to all of them".
"All the emergency services, all the first responders are owed a debt of gratitude by London and I thank them for all the work they do day in day out".
Third, while we need to deprive the extremists of their safe spaces online, we must not forget about the safe spaces that continue to exist in the real world.
A van mowed down pedestrians as it sped down London Bridge on Saturday night, leaving bodies lying in the roadway, a witness to the incident told CNN.
The attackers "had no clue what they were doing".More news: Trump keeps his promises scrapping climate deal
BBC radio said witnesses saw people throwing tables and chairs at the attackers to protect themselves. Two weeks ago, the Manchester Arena was attacked by a suicide bomber. "I saw at least one man stabbed in the chest about five times".
Barman Alex Martinez was forced to take shelter in a bin when a one knifeman entered El Pastor restaurant. We must recall the iconic response of another Londoner to another act of violence, and answer to each of these men with one crucial sentiment: "you ain't no Muslims, bruv".
"The man started screaming and dropping everything on the floor, the plates, the cutlery, the bottle, everything, he dropped it".
Ms Dick gave details of how the incident unfolded.
"Our officers confronted the suspects and brought this awful incident to a conclusion within eight minutes", she said.
Taxi driver Chris was also on London Bridge at the time of the attack.
The distance between the London Bridge and Borough Market. "All Americans stand in solidarity with the people of the United Kingdom", she said.
"It looked like he was aiming for groups of people", Mark Roberts, 53, a management consultant, told Reuters.
"But the last thing we need is people overreacting or beginning to take out their frustrations on other people in other communities or in their own communities".
In another tweet, he advised: "We need to be smart, vigilant and tough". Everybody needs to go about their lives as they normally would.More news: London terror attack: Is London Bridge station open? Latest travel updates
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