Police have named two of the three terrorists responsible for Saturday's deadly attack on London Bridge.
Khuram Shazad Butt, 27, and Rachid Redouane, 30, both from Barking, East London, were identified as the perpetrators of the knife and van attack, which killed seven people and left 49 injured.
Butt was previously known to security services but the Met Police said there was no intelligence to suggest the attack was being planned. Redouane was not known to authorities, Scotland Yard said.
Police detained a number of people in early morning raids in east London as part of the investigation into the London Bridge attack which saw the attackers ram a van into pedestrians on London Bridge before stabbing revellers in bars in the nearby Borough Market.
Isis claimed responsibility for the attack, the third major militant assault to hit Britain in less than three months.
Two of the seven people who were killed have been named, and 21 people remain critically injured in hospital.
A Canadian woman, who died in her fiance's arms after being struck by the speeding van, was named as 30-year-old Christine Archibald.
A 32-year-old man from Hackney, James McMullan, has also been identified as one of the victim's by his family.
Isis was said to have urged extremists to run over civilians in a poster released over the weekend featuring a knife, handgun and lorry urging radicals to "gain benefit from Ramadan".
The three men, wearing fake suicide bomb vests, were shot dead by eight officers outside a pub after police opened fire with an "unprecedented" hail of 50 bullets, while a bystander was also shot.
Scotland Yard said seven women and five men aged between 19 and 60 were arrested under the Terrorism Act in Barking on Sunday. A 55-year-old man was later released without charge.
A vigil was held on Monday evening near London Bridge in honour of the victims of the attack, which took place at around 10pm, while a minute's silence will take place at 11am on Tuesday.
Sadiq Khan told mourners: "As Mayor of London I want to send a clear message to the sick and evil terrorists who commit these crimes: we will defeat you you will not win.
"As a proud and patriotic British Muslim, I now say this: you do not commit these disgusting acts in my name."
Network Rail said London Bridge rail and London Underground stations reopened at 5am but the rail station will be exit only.
People from around the world were caught up as hundreds cowered in pubs and restaurants, barricading themselves inside as the attackers stalked the streets.
Tales of heroism emerged in the aftermath, with one British Transport Police officer taking on the trio armed only with his baton before being stabbed in the head, face and leg.
An off-duty Metropolitan Police officer was also injured after he tackled the men.
Forty-eight people were left in hospital, 21 critically injured.
As counter-terrorism police units and security services launched a huge investigation for the third time in a matter of weeks, officers arrested a dozen people in raids on flats in Barking, east London, where residents said they believed one of the terrorists may have lived.
One neighbour said one of the attackers had recently asked him how he could hire a van.
Good morning, welcome to The Independent's live blog in the wake of the latest atrocity to hit London.
Police have detained a number of people in early morning raids at two addresses in east London.
The Metropolitan Police said officers entered properties in Newham and Barking at 4.15am and "a number" of people had been detained.
Searches were continuing at both addresses, police added.
Residents reported hearing "loud flash bangs and gunshots" in the early hours of Monday morning.
Lead surgeon: London terror victims so traumatised they couldn't speak when they arrived at hospitalA trauma doctor who operated on 12 victims of the London Bridge terror attack said many were so shocked could not speak as the arrived at the hospital. Dr Malik Ramadan, who was in charge of A&E at the Royal London hospital in Whitechapel on Saturday evening, said of the patients who were conscious when they arrived where only able to sit and stare as they were looked after by staff .
Residents reported hearing "loud flash bangs and gunshots" in the early hours of Monday morning as police raided two properties in Newham and Barking.
Police raid two homes in east London after London attackThe IndependentTwo addresses in east London are being searched by police in connection with Saturday's deadly terror attack in the capital. The Metropolitan Police said officers entered properties in Newham and Barking at 4.15am on Monday and “a number” of people have been detained. Searches were continuing at both addresses, police added.
Following this morning's raids, one local resident tweeted: "It woke me up along with the whole street. Extremely loud bangs followed by gunshot bangs. All ok - very shaken residents nearby though."
Police investigating Saturday's attack are working to establish whether the militants were supported by anyone else, the Metropolitan Police commissioner has said.
"A very high priority for us obviously is to try to understand whether they were working with anyone else, whether anybody else was involved in the planning of this attack and to find out the background to it," Cressida Dick told BBC TV.
"We've carried out searches in a variety of places in east London and we've seized a huge amount of forensic material, so we're working very quickly."
She has vowed that officers will "step up a gear" in the wake of the London Bridge terror attack.
Ms Dick described the police response as "extraordinary" and praised an off-duty officer who fought three knifemen with his bare hands when they rampaged through Borough Market.
She told BBC Breakfast she is "enormously proud" of the officer, who was in a serious condition in hospital on Monday morning.
Ms Dick refused to comment on the identity of the attackers or what was found inside the van used in the atrocity.
The Metropolitan Police Commissioner, Cressida Dick, has refused to comment on whether the attackers were known to police.
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