Police named the three knife-weilding men who killed 7 people and injured 48 others on Saturday's attack in London Bridge. Police entered properties in Newham and Barking on Sunday and Monday and a number of people were detained- 7 were women out of 12 arrests. They have all been released without charge.
Police said counterterrorism units had entered two properties early on Monday morning in east London — one in Newham and another in Barking — and “a number of people” had been detained.
Khuram Butt, Rachid Redouane and Youssef Zaghba stabbed revellers in Borough Market, shouting: "This is for Allah," and wearing hoax bomb belts.
Though Isis has claimed responsibility, Police is now trying to put together whatever informations they have about the attackers.
Khuram Butt, 27
Khuram Butt, 27, was born in Pakistan and was a British citizen. He lived with his wife and two children in a flat in Barking, East London.
According to a CV obtained by the BBC, Butt worked at a security firm until 2016 and as a customer service assistant at Transport for London. It also showed that he held a Security Industry Authority (SIA) licence - even though he had been monitored by the security services. Before this, he claimed jobseeker's allowance for seven months, prior to working at a Kentucky Fried Chicken (KFC) franchise in East Ham between 2012 and 2015.
Butt was known to police and security services, and an investigation into him began in 2015, when one man called the terrorism hotline after concerns Butt had been been radicalised. A woman also reportedly went to the local police after she became concerned that Butt was trying to radicalise her children.
Assistant Commissioner Mark Rowley said police and MI5 had downgraded the investigation because "there was no intelligence to suggest that this attack was being planned". Butt had featured in a Channel 4 documentary, The Jihadis Next Door, broadcast in 2016. In the programme, he was seen to support convicted hate preacher Anjem Choudary. It is also believed that was thrown out of a mosque after interrupting an imam's sermon.
Neighbours said they were not aware of anything unusual about him. He even distributed treats during Halloween and also his children played with the neighbours'. His family urged the police to leave them alone to grieve in 'peace'.
Rachid Redouane, 30
30 year old Rachid Redouane was of Moroccan-Libyan origin. He had married a British woman in 2012, the Irish security forces have confirmed. He was a pastry chef in Ireland and was not under surveillance.
The couple had lived in Rathmines, Dublin, at some point, but he may have intermittently visited the UK because he had a European Union permit.
He lived in Barking, and was estranged from his wife. They had an 18-month-old daughter together.
Youssef Zaghba, 22
Italian-Morrocan Youssef Zaghba is believed to be the third attacker. The 22 year old also lived in East London but was an Italian national of Moroccan descent.
Italian police sources confirmed that Zaghba was stopped at Bologna airport in March 2016 when he was on his way to Turkey, due to concerns he might travel to fight in Syria.
Material about the so-called Islamic State group was found on his phone. The BBC was told that the database, which Zaghba was on, would have been shared with British security forces.
