They previously identified two other men as attackers: 27-year-old Khuram Sharzad Butt, a British citizen born in Pakistan, and 30-year-old Rachid Redouane, who "claimed to be Moroccan and Libyan".
Khuram Butt (27), a British national who was born in Pakistan, was filmed praying in front of an Islamic State flag in London's Regent's Park as part of a controversial Channel 4 programme that was broadcast in January a year ago.
British police have come under pressure to explain how one of the jihadists behind the London Bridge attack managed to slip through the counter-terror net, despite being known to security services - and even appearing in a documentary titled "The Jihadis Next Door".
Three knife-wielding attackers on Saturday had unleashed a terror rampage here, ploughing a van into pedestrians on the iconic London Bridge before stabbing revellers in a nearby market, killing seven people.
Neighbors described Butt as an avid weightlifter and Transport for London confirmed he worked for London Underground in customer service before leaving last October. The matter can be dropped or if the complaint seems warranted, police and security officials can open an investigation. He was apparently deemed not to pose an immediate risk, however, and he was not one of the roughly 500 people at the centre of active terrorism investigations.
"In darkness we have a choice, to make the world a better place or let hate win", said one tweet.
London Mayor Sadiq Khan criticized the cuts to the police under the Conservative-led government and argued that London could lose front line police officers if May's Conservative Party triumphs in the election. He was reported to be a pastry chef from Ireland.
The two attackers' pictures were released by police and inquiries were ongoing to confirm the identity of their accomplice.
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"Given the recent attacks, it looks like people were on the radar but somehow they were still able to carry out attacks".
During the vigil on Monday evening, the second in three months for victims of terrorism, Mr. Khan urged the city to unite amid the turmoil. Reports say British intelligence agencies had been warned by their Italian counterparts that Zaghba posed a threat after they managed to prevent him from traveling to Syria.
Barriers have been installed on Westminster, Lambeth and Waterloo bridges following the attack to stop vehicles from mounting the pavement.
"In nine weeks we've had five plots foiled and three successful attacks".
"That is why we agree with the prime minister that things must change".
Her main rival, Labour Leader Jeremy Corbyn, has jumped on the security issue, calling the cuts by Ms.
All 12 people arrested on Sunday after the London attack have now been released without charge.
"If the Metropolitan Police budget is being shrunk and reduced, they have got to prioritise and use their resources in a sensible way", he told ITV television, advocating neighbourhood policing.
"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".
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