Investigators believe three victims were killed on the bridge, including one man who was thrown into the Thames River, before the attackers left the vehicle and stabbed five people to death around London's busy Borough Market, Comm Haydon said.
British police have arrested two more suspects over the London Bridge attack, and revealed that the carnage could have been worse had the attackers succeeded in their goal of renting a larger truck, rather than a van, to mow down pedestrians.
Inside the van, they found 13 supposed Molotov cocktails - made from wine bottles and an apparent flammable liquid - and two blow torches, according to the news station.
The aim of the attackers seems to have been to replicate the attack in Nice, the officer said.
Spain's Foreign Ministry says a British autopsy concluded that Ignacio Echeverria, the Spaniard who confronted assailants during last weekend's attacks in London, died after being stabbed in the back. Police are also appealing for information about the "distinctive" pink "Ernesto" brand knives the men were carrying.
In the weeklong investigation of the attack conducted by the Metropolitan Police's Counter-Terrorism Command, police found multiple petrol bombs left in the van.
Commander Dean Haydon, head of the Met's Counter Terrorism Command, said, "We've been working round the clock to understand what these men did in the lead-up to the attack, but we need to know more about these unusual knives".
Each belt had three disposable water bottles covered in masking tape attached to them. Armed police shot dead the three attackers just eight minutes after the first phone call from the public.
The belts were still on the attackers, who murdered eight people, when they were shot dead by police.
Cops have also released images of the haul of weapons found inside the van, including molotov cocktails.
Butt rented a white Renault van in the evening instead, using a recently activated mobile phone.
The appeal is aimed at visitors who may have been in London at the time of the attacks and have returned home, or anyone else who may have information. Hours later, he and the two others plowed.
Police raided Redouane's small residence on Tuesday and said he had been renting it since April.
London's night czar comedian Amy Lame, who was appointed by Mr Khan previous year, said London's nightlife was "its heart and soul". In the past week or so we've seen 18 people arrested across various parts of London and outside.
"I spoke with the 200 frightened people in the basement and told them that there were armed officers outside, we were safe and we would evacuate them as soon as we could - and I got a big round of applause", he said.
Gardaí are already giving full cooperation to the investigation, with a number of arrests made in Ireland in relation to one of the attackers, Rachid Redouane. Five people died of stab wounds, and nearly 50 people were wounded in the attack.
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Predators on brink as Rinne struggles again in Pittsburgh
Predator coach Peter Laviolette, who talked to The AP, didn't put all the blame on Rinne. "It's not about me, it's all about us. Defensively, the Pittsburgh Penguins are allowing 2.8 goals per game and are killing 79.8 percent of their power play chances.