London Bridge attacker had previous conviction for terrorism offenses

• The U.K.'s Met Police said the individual was released from prison in December 2018 on license.
• The police revealed that the attacker had attended an event called "Learning Together" on Friday afternoon at Fishmonger's Hall on the north side of the bridge.
• The Met believes the attack began inside before he left the building and proceeded onto the bridge.
• He was detained and subsequently shot dead by armed officers.

A forensic investigator takes photographs by London Bridge after a number of people are believed to have been injured after a stabbing, police have said, on November 29, 2019 in London, England. Police said they were called to the stabbing around 2:00 pm local time. Video shared on social media after the incident showed armed officers opening fire on a man who had been pinned down on the bridge walkway. Metropolitan Police said they believed there were several injuries and that a man had been detained.

Chris J Ratcliffe/Getty Images

The London Bridge attacker who killed two people on Friday has been named as 28-year-old Usman Khan who was known to authorities and had been convicted in 2012 for terrorism offenses.

In a statement overnight, the U.K.'s Met Police said the individual was released from prison in December 2018 on license, adding that a key line of the enquiry was now to establish how he came to carry out this attack.

The attacker had attended a prisoner rehabilitation event called "Learning Together" on Friday afternoon at Fishmonger's Hall on the north side of the bridge. The Met believes the knife attack began inside before he left the building and proceeded onto the bridge, where he was detained and subsequently shot dead by armed officers.

The suspect was initially restrained by members of the public and he appeared to be wearing a bomb vest which was later said to be "a hoax explosive device."

One man and one woman were killed during the attack. Three others, a man and two women, were also injured and remain in hospital. Health officials have said one of the injured is in a critical but stable condition.

This undated photo provided by West Midlands Police shows Usman Khan. UK counterterrorism police are searching for clues into an attack that left two people dead and three injured near London Bridge. Police said Saturday, Nov. 30, 2019, Khan, who was imprisoned six years for terrorism offenses before his release last year stabbed several people in London on Friday, Nov. 29, before being tackled by members of the public and shot dead by officers on the London Bridge.

West Midlands Police via AP

The police said it was not actively seeking anyone else in relation to the attack, but were carrying out searches at an address in Staffordshire, in the West Midlands of England, where Khan is believed to have lived.

"Public safety is our top priority and we are enhancing police patrols in the City and across London," Assistant Commissioner Neil Basu for the Met Police said in a statement. Earlier this month, the country downgraded its terrorism threat level from "severe" to "substantial."

The BBC reported that Usman Khan was sentenced to "indeterminate detention" in 2012 with a minimum jail term of eight years, adding that it would have allowed him to be kept in prison beyond that minimum term. The prosecution at the time said the plotters, including Khan, had discussed attacking the London Stock Exchange as well as pubs in the English city of Stoke.

In 2013, the U.K.'s Court of Appeal quashed that sentence and replaced it with a 16-year-fixed term with half of it being spent in jail.

The U.K.'s Times Newspaper reported on Saturday that the convicted terrorist was released from jail last year after agreeing to wear an electronic tag to monitor his movements.

Friday's incident came 2½ years after eight people were killed and 48 were injured in a terrorist vehicle-ramming and stabbings along London Bridge, which links the capital's business district with the south bank of the River Thames.