Police said authorities killed Khuran Shazad Butt, 27, Rachid Redouane, 30, and one other man after they jumped out of a hired van that had slammed into pedestrians on the London Bridge late Saturday and stabbed multiple people at nearby Borough Market.
The second alleged attacker was identified by police as Rachid Redouane, who alternately used the surname Elkhdar, and claimed to be Moroccan and Libyan.
"However, there was no intelligence to suggest that this attack was being planned", they said, adding.
- Butt briefly worked for Transport for London, the entity that oversees the city's public transport system.
Mr Khan's spokesperson had described the first round of presidential tweets as "ill-informed" - and said they had deliberately taken his remarks out of context. London police say they can not confirm the names of people caught up in the attack. According to a statement posted to its "Amaq" propaganda outlet, ISIS said a "detachment" of its fighters had carried out the attacks. May faced questions over cutting 20,000 police posts in her time as Home Secretary.
Jeremy Corbyn, leader of the main opposition party, called on May to resign over the issue, saying earlier that "you can not protect the public on the cheap", and promising to recruit another 10,000 police officers if he is elected into power.
Qatar says Kuwait trying to solve diplomatic rift
It's also a home to the forward headquarters of CENTCOM, the US military's central command in the region. Qatar state-owned media network Al Jazeera has already been blocked across Saudi Arabia and the UAE.
British police are stretched by the number of people they believe could potentially commit an act of terrorism. "Perpetrators are inspired to attack not only on the basis of carefully constructed plots after years of planning and training-and not even as lone attackers radicalized online-but by copying one another and often using the crudest of means of attack".
Inquiries are ongoing to confirm the identity of their accomplice.
Police were not yet releasing the names of the dead, but thousands of people gathered at Potters Field, across from the Tower Bridge and the medieval Tower of London, to pay tribute to the victims. On Monday, concrete barricades had been erected to separate pedestrians from vehicles on some of the city's major bridges.
Security had already become a battleground issue ahead of Thursday's general election following the Manchester bombing last month, in which 22 people were killed as they left an Ariana Grande concert.
"JTAC - that's the independent Joint Terrorism Analysis Centre - have confirmed that the national threat level remains at Severe; that means that a terrorist attack is highly likely", she said after a meeting of top national security officials.
Shafiq said Butt was at the time with radical preacher Anjem Choudary, the former head of a now-banned group called al-Muhajiroun.
Mother arrested after toddler shot by 3-year-old brother
No phone listing could be found for Abeyta, and it wasn't clear if she had an attorney who could speak on her behalf. Police initially said the 2-year-old was in critical condition; he since has stabilized.
Eighteen are still in hospital in critical condition, according to an update by Britain's National Health Service.
Britain has received messages of solidarity from numerous world leaders including Donald Trump, although the USA president also struck a discordant note by issuing tweets criticising London Mayor Sadiq Khan.
Asked by ITV television if he backed the calls for May to resign, he said: "Indeed I would".
Mrs May said a terrorist attack was highly likely.
Details of the investigation had been kept closely under wraps, in stark contrast to last month's Manchester bombing, when photos and information from the investigation were repeatedly leaked to the USA media, triggering a row between the British and American governments.
Apple to introduce new iPhone to block block text, calls while driving
Yesterday at WWDC 2017 Apple not only announced details of iOS 11, the company also unveiled a completely redesigned App Store. Memories is smart enough to curate highlights of your camera roll optimized for both portrait and display modes.