More details emerged on Saturday about the London Bridge attacker who was killed by police officers who responded to the attack.
According to authorities, the man, identified as 28-year-old Usman Khan, had been convicted of terrorism-related charges including hatching a plan to blow up the London Stock Exchange, the British Broadcasting Corporation (BBC) has reported.
Usman was released in December 2018 after he agreed to put on an electronic tag so that his movements could be closely monitored by law enforcement authorities.
Met Police Assistant Commissioner Neil Basu confirmed that Usman had been released and said that investigations into how he was able to carry out the attack had started.
"He was released from prison in December 2018 on licence and clearly, a key line of enquiry now is to establish how he came to carry out this attack," Basu said.
The Parole Board which has come under fire after the London Bridge attack has strongly denied any responsibility in the release of the attacker.
A search is already underway at flats in Stanford believed to be linked to the Friday attack.
"Whilst we are still in the early stages of the investigation, at this time we are not actively seeking anyone else in relation to the attack."
"However, we continue to make fast time enquiries to ensure that no other people were involved in this attack and that there is no outstanding threat to the public," he added.