London Bridge attacker's early release from prison under scrutiny

London Mayor Sadiq Khan on Saturday said "big questions" needed to be answeredfollowing the revelation that the London Bridge attack suspect had served jail time for terrorism offences.

He also repeated the British capital would never give in to extremist attackersand would be open for business as usual over the Christmas holidays.

The mayor was speaking as police searched homesin Stafford, 225 kilometres northwest of London, in connection with the investigation.

A man and a woman were killed and three other peoplewere wounded when the suspect, named as 28-year-old Usman Khan, stabbed them before he was tackled by bystanders and shot dead on Friday by three officers who surrounded him and fired twice.

Usman Khan, a British man whose family is from Pakistan-controlled Kashmir, was convicted for terrorism offences in 2012 for his part in an al-Qaeda-inspired plot to place a bomb in atoilet atthe London Stock Exchange. He was released in December 2018, subject to conditions, before the endof his sentence.

Wearing a fake suicide vest and wielding knives, Khan went on the rampage shortly before 2 p.m. on Friday before being wrestled to the ground and then shot by specialist armed police. He was reportedly wearing an electronic tag.

The attack beganat the Learning Together conference on criminal rehabilitation, organized by Cambridge University at Fishmongers Hall on the northern side of London Bridge before spilling outside onto the bridge,Neil Basu, London's police counterterrorism chief, told reporters on Saturday. Basu saidsome of those present at theevent confronted the attacker and tried to stop him.

"The attacker then left the building and ended up on London Bridge, he was pursued and detained by members of the public, as well as a British Transport Police officer who was in plain clothes, before armed officers from both the City of London and Metropolitan Police arrived, confronted the attacker and shot him."

Basu said investigators have found no evidence to suggest anybody else was involved in theattack.

Watch: Man with knife wrestled to the ground (Warning: Graphic content)

Police and bystanders disarm attacker at London Bridge (WARNING: Graphic content)

5 years ago

Duration 0:39

Knife-wielding man wrestled to ground, bystander backs away holding weapon believed to be the attacker's.

The three wounded victims remain in hospitaland the most seriously injured "has now improved," Britain's National Health Services said on Saturday.

"I don't think that it's right that somebody is convicted of a serious offence like what this man is convicted of, should be automatically released," the Londonmayor said.

He said he believes in prisoner rehabilitation but also in the need for those released to be "properly supervised with a system that is effective."

Sadiq Khan joined the capital's police chiefs on a tour of the London Bridge area on Saturday. He earlier spoke to London-based radio station LBC about the IPP (imprisonment for public protection) model for dealing with prisoners with a history of harming others, which wasabolished in December of 2012.

The mayor saidthe "indeterminate sentences for the protection of the public" meantthat if "found guilty of a very serious terrorist offence, you will not be released until you can persuade the authorities that you are no longer danger to the public."

He added judges have to give the "right sentences"because people convicted of very serious offences can still be a danger to the public and can be released after serving just half their sentences.

Usman Khan was imprisoned after receiving a sentence of IPP, but he and two others successfully appealed those sentences. In 2013, the court of appeal revised his sentence to 16 yearsand told him he would have to servea minimum of eight years.

Prime Minister BorisJohnson also spoke Saturday about the sentencing of people convicted of terrorism offences, saying they should notbe allowed out of prison early.

"I think that the practice of automatic, early release whereyou cut a sentence in half and let really serious, violentoffenders out early simply isn't working, and you've some verygood evidence of how that isn't working, I am afraid, with thiscase," Johnson said.

The U.K. parole board issued a statement on Saturday saying it appears Usman Khan was released automatically "on licence" which means he had to meet certain conditions or face recall to prison without ever being referred to the board.