London Bridge attack: Boris Johnson says 74 convicted terrorists released early

Boris Johnson has revealed there are 'around 74' convicted terrorists on early release in the UK - including two jailed alongside killer Usman Khan.

The Prime Minister was quizzed by the BBC's Andrew Marr, two days after Khan stabbed two people to death and injured another three in London Bridge.

Khan, 28, had been freed in December last year after serving less than half his 16 year prison sentence.

Authorities are now facing questions over why Khan was free to carry out his knife rampage on Friday.

And fears have been voiced that others could slip through the net.

Usman Khan is believed to have duped those keeping tabs on him into thinking he was no longer a threat (BBC)

Mr Johnson said the dozens of other cases are now being "properly invigilated" in light of the London Bridge attack.

Khan was wearing a fake suicide vest and reportedly threatened to blow up Fishmongers' Hall, where he was attending a conference for former prisoners.

This morning the Prime Minister told Mr Marr that more than 70 others convicted of terror offences have been released early.

He stated: "As for your question about how many others there are, there are probably about 74."

The Prime Minister revealed the number of convicted terrorists released early on The Andrew Marr Show (BBC/AFP via Getty Images)

Pushed on what is being done about them now, he added: "What we're doing there is we've taken a lot of action as you can imagine in the last 48 hours. I don't want to go into the operation details.

"I'm sure people can imagine what we're doing to ensure that 74 other individuals who've been let out early on the basis of this Labour change in legislation, they are being properly invigilated to make sure there is no threat."

Mr Johnson continued: "I do think there is an issue, as I have said, with automatic early release.

The terrorist was gunned down by specialist officers (Cliff Hide/LNP)

"I think it's wrong for serious sexual offenders, I think it's wrong for violent offenders, I think it's wrong for terrorists."

Khan was a member of a terror cell which plotted to attack targets including the London Stock Exchange, and set up training camps in Kashmir.

He was given an indefinite prison sentence in 2012, but won an appeal the following year - and his sentence was reduced to 16 years.

Fellow cell members Mohammad Shahjahan and Nazam Hussain were jailed alongside Khan, and also won their appeals.

Both have been released without serving their full sentences.

Earlier today Labour Party leader Jeremy Corbyn .