U.K. Prime Minister Theresa May vowed June 4 to step up the fight against terrorism after a terrorist attack June 3 that left seven people dead and 48 injured, and said the general election scheduled for June 8 will go on as planned.
London police said they have arrested 12 people in connection with the attacks.
A group of assailants in a van mowed down pedestrians on London Bridge before attacking others with knives in nearby Borough Market. Three attackers were shot dead within eight minutes of the first call to emergency services, the police said.
"We cannot and must not pretend that things can continue as they are. Things need to change," May told reporters the morning after the attack. "It is time to say enough is enough."
She called for a review of Britain's counterterrorism strategy as well as tighter regulation of the internet to deny extremist ideology the "safe space it needs to breed," according to media reports.
It was the third major terrorist attack in the U.K. in three months. A suicide bomber attacked as people left a concert by pop singer Ariana Grande on May 22. There were 23 fatalities, including the bomber, and scores of injuries. A number of those were teenagers and children.
In March, a man driving a car fatally wounded four pedestrians near the U.K. Parliament before stabbing a police officer to death and being shot dead himself.