Britain's Boris Johnson said Sunday the security services were stepping up monitoring of convicted terrorists released early from prison, as the London Bridge attack became embroiled in the election campaign.
The prime minister revealed officials were scrutinising around 74 people with terrorist convictions who had been released early from prison like Usman Khan, who left jail last December and went on to stab two people to death in Friday's rampage.
"They are being properly invigilated to make sure there is no threat," Johnson told the BBC.
"We've taken a lot of action as you can imagine in the last 48 hours."
Khan, 28, was shot dead wearing a fake explosives vest by police on London Bridge after a stabbing spree launched in a nearby hall hosting an ex-offender event that also left three people injured.
Police on Sunday formally named the two victims killed as Jack Merritt, 25, from Cambridgeshire in eastern England, and 23-year-old Saskia Jones of Warwickshire in the West Midlands.
Meanwhile hospital officials said one of the injured had returned home, while the two others remained hospitalised in a stable condition.
Members of the public have been hailed as heroes for preventing even greater loss of life by tackling Khan -- one armed with a five-foot (1.5-metre) narwhal tusk and another with a fire extinguisher.
The incident came two years after terrorists in a van ploughed into pedestrians on London Bridge before attacking people at random with knives, killing eight people and wounding 48.
'Keep you safe'
After searching on Saturday two properties in central England believed to be linked to Khan, police have said they believe he was acting alone and are not seeking anybody else.
But ISIS has released a statement claiming responsibility for the attack.
Khan, a British national, had been handed an indeterminate sentence for the protection of the public in 2012 of at least eight years in prison.
He was part of an eight-man network inspired by Al-Qaeda who had plotted to bomb targets including the London Stock Exchange, and planned to take part in "terrorist training" in Pakistan.
But his sentence was quashed by the Court of Appeal in 2013 and he received a new 21-year term, comprising a custodial sentence of 16 years and five years on conditional release.
He was then conditionally released from jail around a year ago under so-called licensing conditions after serving about half of his jail term.
Khan has become a contentious political issue ahead of Britain's December 12 election, with Johnson blaming the previous Labour government for changing the law in 2008 to allow for the early release of prisoners.
The Conservative leader vowed that if he reclaims power this month he will end early release for terrorist offences and introduce minimum 14-year sentences, with some convicted never to be released.
The proposals were not in the Conservatives' formal manifesto issued last Sunday.
Johnson penned an article setting out the new stance in The Mail on Sunday newspaper, under the headline: "Give me a majority and I'll keep you safe from terror".
Critics have hit out fiercely at Johnson for appearing to politicise Friday's attack -- including the father of Jack Merritt.
The victim was a course coordinator at Cambridge University's criminology institute, which was hosting its event by London Bridge to mark five years of its prisoner rehabilitation programme.
Khan, a participant in the initiative during his imprisonment, attended the event armed with two knives, stabbing five people there.
David Merritt wrote on Twitter that his son as "a beautiful spirit who always took the side of the underdog".
"We don't need knee-jerk reactions," he added in a series of messages responding to the political furor around the attack.
"It's not lenient policies that are to blame, it's the destruction of the probation service that is supposed to monitor and supervise prisoners after release, & rehabilitation services," he added.
"Since 2010 these service(s) have been cut to the bone. We are all less safe as a result."
That's also the view of Johnson's main opposition, the Labour Party which noted that his Conservatives have been in power for nearly a decade but had chosen not to tighten the laws around terrorism sentencing.
"I think there has to be an examination of how our prison services work and crucially what happens to them on release from prison," Labour leader Jeremy Corbyn told Sky News.
He would not commit to ending early release in all scenarios for terrorism offences.
"I think it depends on the circumstances and it depends on the sentence but crucially depends on what they've done in prison," Corbyn said.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)