UPDATE June 11, 8:40 a.m. EST:
London police have released photos of fake suicide vests worn by the men who attacked the London Bridge on June 3, killing eight people before being shot dead.
The belts were made of duct tape and water bottles. It's thought that the men wore the belts because they believed they were going to take hostages, or that they saw the belts as protection from being shot.
Geoff Ho, a Sunday Express journalist who fought off an attacker after being stabbed, wrote an account of the incident in the newspaper about how he tried to stop the attackers from going into a crowded bar.
Ho wrote that “their eyes were full of rage,” and he was afraid they may detonate themselves.
“I couldn’t just attack,” he wrote. “If I charged at them, maybe I could take out one or two. But one of those animals could detonate and kill us all.”
(The Associated Press contributed to this report)
UPDATE June 6, 6:21 a.m. EST:
London authorities say that Moroccan-Italian Youssef Zaghba has been named as the third man involved in the London attack that left seven people dead on Saturday, reports the BBC.
UPDATE 1:54 p.m. EST:
London police have named two of the three attackers in the terror episodes on London bridge that left seven people dead, reports Time.
Authorities said 27-year-old Khuram Shazad Butt, a British citizen born in Pakistan, and Rachid Redouane, who claimed both Libyan and Moroccan nationalities, are two of the men responsible.
Police say that investigations into the identity of the third attackers are still being conducted.
UPDATE 8:08 a.m. EST: Americans are among those injured in the attack.
UPDATE June 5, 6:54 a.m. EST: Authorities have identified the London attackers.
UPDATE June 4, 5:50 p.m. EST:
The Islamic State has claimed responsibility for the London terror attacks that killed seven people Saturday night.
The Islamic State's official Amaq new agency claimed "a detachment of ISIS fighters" were responsible for the attack, according to the head of the SITE intelligence group.
UPDATE 6/4, 4:52 p.m. EST
British police have arrested a dozen people Sunday in connection to the London terror attacks, which left seven dead and 48 injured. Of those injured, 21 remain in critical condition, according to Mark Rowley from the London Metropolitan Police Department.
Three of the attackers were shot and killed by police within eight minutes of the first emergency call, CNN reports.
WATCH | Police recount details of the London Bridge attack
"We are making significant progress in identifying the three attackers," Rowley said during a press conference.
He added that the three armed men were wearing what appeared to be suicide belts. Rowley said officers fired "an unprecedented number of rounds" at the men, who they feared were suicide bombers, to be completely sure they'd neutralized that threat.
A bystander was injured in the shootout, but police believe that person's injuries are not critical.
UPDATE 6/4, 6:26 a.m. EST:
Seven people are now confirmed dead after a van plowed into pedestrians on London Bridge last night, reports The Washington Post. The death toll does not include the fatalities of the three attackers inside the van, who were shot by police 8 minutes after the first emergency call.
The London Ambulance Service said it had taken “at least 48 patients to five hospitals across London.”
British Prime Minister Theresa May said that the terrorist attacks were part of a "new trend," and that such attacks were driven by "evil ideology" that says that western values are incompatible with Islam.
May also announced that British officials had disrupted five credible terrorist plots since March.
VIDEO | A van plowed into pedestrians on London Bridge
UPDATE 8:51 p.m. EST
London Mayor Sadiq Khan released a statement calling the Saturday night incidents a "deliberate and cowardly attack on innocent Londoners."
"My thoughts are with everyone affected, and I'd like to thank the brave men and women of our emergency services who were first on the scene and will be working throughout the night," Khan said.
Khan encouraged Londoners to report any suspicious activity to police.
UPDATE 8:41 p.m. EST
The U.S. Embassy in London has issued an emergency alert for U.S. citizens following two incidents that are being investigated as a "potential act of terrorism."
"U.S. citizens in London are urged to avoid those areas and follow local media and other information sources for additional guidance," the release said.
The embassy also encouraged people to remain aware of their surroundings, "especially in crowds or at large events."
UPDATE 7:52 p.m. EST
London's Metropolitan Police Service said the incident at Vauxhall was a stabbing but is not connected to the incidents at London Bridge or Borough Market.
The other two are being investigated as potential "terrorist incidents," according to police.
UPDATE 7:39 p.m. EST
Prime Minister Theresa May said the incident in London is being treated as a "potential act of terrorism." She will chair a meeting of the government’s emergency response committee on Sunday.
The UK's terror threat had recently been lowered to "severe," just weeks after a bombing killed 22 people at an Ariana Grande concert in Manchester.
President Donald Trump tweeted saying the U.S. is ready and willing to help.
Whatever the United States can do to help out in London and the U. K., we will be there - WE ARE WITH YOU. GOD BLESS!— Donald J. Trump (@realDonaldTrump) June 3, 2017
We need to be smart, vigilant and tough. We need the courts to give us back our rights. We need the Travel Ban as an extra level of safety!— Donald J. Trump (@realDonaldTrump) June 3, 2017
Trump also touted his travel ban in response to the incident in London.
UPDATE 6:46 p.m. EST
The BBC is reporting that more than one person has died in the London Bridge incident.
London police are urging people to remain calm and stay alert.
UPDATE 6:46 p.m. EST
London's Metropolitan Police Service says officers are responding to a third incident in the Vauxhall area, which is in southwest London.
In addition, police say shots were fired after they responded to reports of stabbings in Borough Market.
Police also encouraged those in the three reported areas to take cover.
VIDEO | Police are responding to reports of a van hitting pedestrians on London Bridge
UPDATE 6:39 p.m. EST
Prime Minister Theresa May has been in contact with officials on the ground and is receiving updates on the London Bridge incident.
In addition, White House press secretary Sean Spicer tweeted saying President Donald Trump has been briefed on the situation.
UPDATE 6:23 p.m. EST
London's Metropolitan Police Service said they have also responded to reports of a separate incident at Borough Market.
Witnesses told CNN two men entered a restaurant at Borough Market and stabbed two people inside. Police said armed officers are now on the scene.
Police are responding to reports that a van has hit multiple pedestrians on London Bridge in central London, according to the BBC.
London's Metropolitan Police Service tweeted saying officers are now on the scene.
Witnesses told the BBC the van veered off the pavement and struck several people. BBC reporter Holly Jones was on the bridge at the time and said the van was going about 50 mph.
Transport for London told the BBC the bridge has been closed in both directions.
The London Ambulance Service Resilience Team asked people to avoid the area.
The U.S. Embassy in London also advised people to stay away from the bridge.
The Associated Press contributed to this report.