British police investigating the deadly attacks on London Bridge on Saturday said they had arrested three more suspects, as footage of the moment officers shot the assailants dead appeared online.
Butt, 27, embraced radical Islam during his time in London and was once filmed in a documentary called "The Jihadis Next Door".
"A 30-year-old man was arrested on suspicion of the commission, preparation or instigation of terrorist acts (contrary to section 5 Terrorism Act 2006) and has been taken into custody at a south London police station under the Terrorism Act 2000".
Moments after naming the identity of the third London attacker identified as Youssef Zaghba, British police received hard knocks from Italian officials who claim they passed on concerns about the attacker to British intelligence officials past year.
Police yesterday carried out a new search in a neighborhood in east London near the home of two of the London Bridge attackers.
A police auto then screeches into shot, with three armed policemen exiting and immediately trying to rescue the man by diverting his attackers' attention towards them.
Police have said Redouane was not known to security services.
Boden's family say she was killed after running towards the attack to try to help victims who were laying injured on the pavement.
Prince Harry has spoken in praise of Australians living in London after two of them were confirmed to have been killed in the van and knife attacks there over the weekend.
Eight people are now known to have died in the attack, all of whom have been identified, while 10 further victims remain in critical condition.
He said Zaghba was always tracked by Italian intelligence officers while in the country and that United Kingdom authorities were informed.
A 27-year-old was arrested on suspicion of the preparation of terrorist acts and a 33-year-old was arrested on suspicion of possession with intent to supply controlled drugs, police said. The intended truck was smaller but similar to the one used in the Nice attack past year that killed 86 people and injured hundreds in the resort town in the south of France.
Several people had alerted police to Butt's extremist views and he also appeared previous year in a documentary, "The Jihadis Next Door", in which he is shown unfurling a black-and-white flag associated with the Islamic State group.