ISIS claims London attack after 12 arrests made

The vehicle and knife attack killed seven people in a busy section of London Saturday and wounded about 50 people.

"And the Mayors of the U.S. whose cities have been hit with an attack of hate and murder have an even more personal feeling for London Mayor Khan". Police said they used an "unprecedented" number of bullets to take down the attackers.

Canadian Prime Minister Justin Trudeau said he was "heartbroken" that a Canadian was among those killed.

"At this time", an official statement said, "we have no information to indicate a specific, credible terror threat in the United States" as a result of the London attack.

Armed British police officers walk within a cordoned off area after the attack.

Nick Archer, who was in the London Bridge area, says he came out of a bar and looked to his left and saw a man lying on the ground.

The attack at iconic London Bridge and a nearby market was the third terrorist strike in Britain in less than three months.

May said that Britain was facing a new threat from copycat attacks, and "it is time to say 'enough is enough.'" She called for global agreements to curb online extremism, said longer jail sentences might be needed for terrorism offenses and argued that there is "far too much tolerance of extremism in our country".

The terrorist act occurred just weeks after a suicide bomber detonated his armament in an Ariana Grande concert at the Manchester Arena.

Twenty-one remained in critical condition Sunday.

"Having visited the officer in hospital shortly after he was admitted for treatment, I was able to hear his account of what happened last night", said BTP chief constable Paul Crowther. She said the recent terror attacks in Britain, while not directly linked, "are bound together by the single evil ideology of Islamist extremism". The arrests followed a raid by police at a flat owned by one of the three attackers.

Gerard Vowls, 47, said he saw a woman repeatedly stabbed, and threw chairs, glasses and bottles at the attackers in a bid to stop them.

According to witnesses and police, three men then jumped from the van with large knives and began attacking people at bars and restaurants at Borough Market, which is a popular spot for pubs less than a quarter of a mile south of the bridge.

She said the series of attacks represented a perversion of Islam and that Britain's counter-terrorism strategy needed to be reviewed, adding: "It is time to say enough is enough". Mrs May said they were "worn only to spread panic and fear".

Seven people died in the attack and dozens were wounded. "We need the Travel Ban as an extra level of safety!" Three major London hospitals said that they were on lockdown to keep patients and staff safe.

Video showing Londoners fleeing the scene of the deadly vehicle and knife attack on London Bridge Saturday night captured one man walking slowly in a crowd, with a almost full pint in tow.

A spokesman for the East London Mosque & London Muslim Centre, in Tower Hamlets, said: "The attacks carried out in London Bridge yesterday evening are deeply shocking".