Jack Merritt, 25, and Saskia Jones, 23, both students of the University of Cambridge, were killed at a university-linked Learning Together prisoner rehabilitation conference at London Bridge, which was attended by Khan as a prisoner out on early release from jail with an electronic tag.
Jeremy Corbyn, who is being interviewed by Sophy Ridge on Sky, is being asked whether he supports a shoot-to-kill policy and questioned on whether he supports the police decision to shoot dead London Bridge attacker Usman Khan.
Khan was convicted of terror offences in February 2012 and released from prison on licence in December 2018, halfway through his 16-year prison sentence.
Police officers stand behind the cordon at the scene of a stabbing near London Bridge, in which two people were killed, in London, England, November 30, 2019.
Chris Phillips, former head of Britain's National Counter Terrorism Security Office, took issue with asking law enforcement to keep the country safe while letting people out of prison when they are still a threat. He had been released on licence, or parole, in December previous year and was reportedly being monitored via an electronic tag. United Kingdom home secretary Priti Patel, who had recently unveiled plans for tougher sentences for violent criminals, said the police needed "space and time" to complete the investigation and that it was not right to "speculate".
Khan - a participant in the program during some of his roughly eight years of prior imprisonment for terrorism offenses - showed up armed with two knives, and stabbed five people.
The attack raises hard questions for Britain's government and security services.
Opposition parties blamed years of cuts to the prison and probation services by the Conservatives, who have been in power since 2010. He was given an "indeterminate" sentence in 2012 that specified he could only be released when he was judged not to be a danger to the public. "Terrorism has no place in our society and we stand resolute against it".
Khan spent time at HMP Whitemoor, a maximum-security prison where Learning Together runs courses for inmates.
Critics have hit out fiercely at him for appearing to politicise Friday's attack - including the father of the first named victim. "The reason this killer was out on the streets was because of automatic early release which was brought in by a leftie government", Mr. Johnson said Sunday. As of yet, the number of those being reviewed is said to be around 70.
"This disaster is one that was created in the Treasury", Acheson told the BBC. "At the heart of this is the destruction of the prison and probations service through insane failed ideological and austerity cuts".
But Merritt's family has warned against a knee-jerk reaction to his death.
"We know Jack would not want this awful, isolated incident to be used as a pretext by the government for introducing even more draconian sentences on prisoners, or for detaining people in prison for longer than necessary".
Two others injured in the attack remain stable in the hospital and a third has been able to return home. The third was discharged over the weekend.
In the wake of the attack, authorities are urgently reviewing the release of more than 70 other former terror prisoners.
As part of that work, a 34-year-old man was arrested Saturday in Stoke-on-Trent, central England, on suspicion of preparation of terror acts.
Justice Secretary Robert Buckland said any of the individuals concerned who was found to be in breach of their licence conditions would be recalled to prison.