London Bridge attacker tried to rent larger truck

London attackers tried to rent a bigger van but credit card was declined

Although Islamic State militants have claimed responsibility for the attack, Haydon said there was no evidence the attackers - Pakistani-born Briton Khuram Butt, Italian Youssef Zaghba and Rachid Redouane who had links to Libya, Morocco and Ireland - were directed by anyone else, either in Britain or overseas.

"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. But obviously we will be reviewing, for example the number of armed officers we have and how they work, and a whole host of other things that is likely, from my point of view, to take more resources and I will be asking for them".

It appears that British security services are themselves concerned that they could be losing track of potential threats - sources said that after the Manchester bombing, security agencies began re-evaluating the risk level of individuals categorized as former subjects of interest.

The latest arrest marks the fourth person held over the atrocity on Saturday night, that left eight people dead and scores injured.

The men failed to provide payment details and the vehicle was not picked up, prompting them to use a smaller van from a DIY store instead.

It was not clear why he could not pay, or if he lacked the necessary license to drive such a vehicle.

Last July, a 31-year-old Tunisian extremist rammed a 19-tonne truck through a crowd celebrating Bastille Day in the French Riviera city of Nice, killing 86 people and injuring more than 400.

Police also discovered Molotov cocktails inside the van that was used. Within minutes, the attackers are shot dead and another police auto arrives as people are seen running for their lives.

Investigators believe three victims were killed on the bridge - including one man who was thrown into the Thames - before the attackers left the vehicle and stabbed five people to death around Borough Market in London.

The trio were wearing hoax suicide belts made of plastic water bottles wrapped in grey duct tape.

In the van police found 13 wine bottles containing flammable liquid with rags stuffed in them, essentially Molotov cocktails, and blow torches to ignite them, potentially meant for another wave of attacks. I also cannot escape the thought that I or a friend of mine could easily have been in the position of the victims, as I live less than two miles away and I was crossing this bridge just some days before the attack.

"They were still fairly close to the van".

"My colleague had been listening to the police radio channel and he came running in to tell me a van had ploughed into pedestrians on London Bridge", said Inspector Cole.

Inside the van, gravel, chairs and a red suitcase can be seen, which detectives believe were props for a cover story the terrorists used to justify the rental to their families.

Scotland Yard said the 29-year-old man was arrested after police stormed a home in Newham just after 1.15am.

Additionally, detectives found a Koran opened to a page about martyrdom in the attackers' safe house, and a stockpile of weapons in the van. Where might the attackers have bought them from? He was jailed past year for encouraging support of IS, which has been linked to numerous militant plots in Britain and overseas. He also had two cautions, one in 2008 for fraud, and one in 2010 for assault.

Butt had been investigated by MI5 in 2015 but slipped off their radar after they found no evidence of attack planning or any crime.

"We got the door open and I instructed my medic to set-up a triage area downstairs", explained Inspector Cole.



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