Campaigning for Britain's general election was suspended for a day after British police said seven people were killed and 48 others injured when a white van mowed down pedestrians on London Bridge in the city's center, and three attackers were shot dead after stabbing several victims at nearby Borough Market on Saturday night.

UK Prime Minister Theresa May held an emergency meeting of COBRA, the government committee that coordinates intelligence matters, on Sunday and afterward said: "The whole of the country needs to come together to counter this extremism. We need to review our counterterrorism strategy, to see police have everything they need."

She added: "It is time to say enough is enough."