>> At least two out of the three men who staged the knife and vehicle attack in London were already known to authorities in the UK or elsewhere. An Italian source telling Reuters the third man to be identified, Moroccan-Italian, Youssef Zaghba, had been flagged by Italian authorities, to the UK, after he moved to England last year.
Police had already named the other two as Pakistani-born Briton Khuram Shazad Butt, and 30-year-old Rachid Redouane. Butt certainly was known to UK intelligence services, though he wasn't considered a serious enough threat for close monitoring. This is said to be his CV detailing his work for Transport for London.
>> Extremists, including ISIS.>> And, last year, he appeared in a TV documentary called The Jihadis Next Door. One neighbor had reported him for trying to radicalize her children, and another for listening to extremist sermons online. So why wasn't more done to cover such a high profile suspect?
Reuters' Mike Holden.>> The police, themselves, say this is incredibly hard. You have 23,000 people who have been reported to them as potential jihadis in Britain. Of those, they say 3,000 pose a serious risk. It doesn't require a lot of planning, and since someone can put it together within weeks, and therefore it becomes much much harder for police and security services to thwart.
Now security officials say they need a serious rethink regarding how to stop plots as simple and unpredictable as the ones in London and Manchester. At 3 PM on Saturday, Butt was asking where he could hire a vehicle. By 11, the deed was done. The police have thwarted 18 plots since 2013, and moved incredible quickly at London Bridge.
Within 8 minutes of the first call, all three assailants were dead. But it's Britain's third attack in three months, all of them involving people already on the police or MI5 radar. That puts the police and Prime Minister Theresa under mounting pressure.>> Critics of Theresa May would say, you've cut policing.
A lot of the intelligence that leads to, and in terms of services and the police finding out who may be of a risk, comes from neighborhood policing. Comes from having officers out on the street talking to people in the local communities.>> With Britons due to vote in a general election on Thursday, security has shot to the top of the political agenda.
Police, politicians, and the public all wondering if more could have been done.