British Prime Minister Theresa May called on Sunday for a stronger response to Islamist extremism after three attackers rammed a hired van into pedestrians on London Bridge and stabbed others nearby, killing seven people and injuring 48.
The attack occurred five days before a parliamentary election and was the third to hit Britain in less than three months. May said Thursday's vote would go ahead.
"It is time to say enough is enough," the Conservative leader said outside her Downing Street office, where British flags flew at half-mast.
"We cannot and must not pretend that things can continue as they are," May said, calling for a beefed-up counter-terrorism strategy that could include longer jail sentences for some offenses and agreements to regulate cyberspace.