Police carried out fresh raids and arrested "a number of people" on Monday after the Islamic State group claimed an attack by three men who mowed down and stabbed revellers in London on June 3, killing seven people, before being shot dead by officers. He is expected to survive.
Thousands attended a vigil on Monday evening to honour the victims outside London's City Hall, close to London Bridge.
The Metropolitan Police said: "Khuram Shazad Butt was known to the police and MI5".
Dozens were injured, 18 of them critically, in the attack that started on the London Bridge, when three attackers swerved the vehicle into pedestrians then, armed with knives, rampaged through Borough Market, slashing and stabbing anyone they could find.
He forcefully referred to his controversial executive order on immigration - that seeks to block people from Iran, Libya, somalia, Sudan, Syria and Yemen from entering the USA - as a "travel ban". The U.S. Embassy would not comment.
Monday's early morning raids follow raids on a housing complex in Barking east London on Sunday, where a series of arrests were made. May said Monday that 11 remained in custody and one was released without charge. She has not been heard from since the attacks and typically rang her mother every day. "London is coming back to work", said Dick.
Armed police responded within eight minutes and shot and killed all three men at Borough Market.
ISIS claimed responsibility for the attack on Sunday night, although they provided no evidence for their involvement or details of the attack. The assailants were wearing what appeared to be fake explosive vests, Metropolitan Police Assistant Commissioner Mark Rowley told reporters.
Christine Archibald, a 30-year-old Canadian who had worked in a shelter for the homeless before moving to Europe to be with her fiance, was the first of those who died to be named.
The victim's family paid tribute by sending out a statement, writing that "We grieve the loss of our handsome, loving daughter and sister".
After more than 20 people were killed in a bomb attack last month at a concert in Manchester, England, Trump condemned the assault as the act of "evil losers" and called on nations to band together to fight terrorism.
Britain's general election will be held on Thursday as scheduled, and supporters of the opposition Labour Party accused May of politicizing the attack.
In addition to the three recent attacks in Westminster, Manchester and the London Bridge area on Saturday, Dick said a further 18 plots had been foiled since 2013.
Sunday Express editor Martin Townsend said: "Geoff Ho is an absolutely first class reporter and a fine and decent man and our thoughts are with him and his family at this time. If you know Tyler, please be there for him now, and later when what happened sinks in, he's going to need us all".
People from around the world were caught up as hundreds cowered in pubs and restaurants, barricading themselves inside as the attackers stalked the streets.