UK PM May says Westminster incident shocking, terrorism threat remains severe

A suspected attack outside the Houses of Parliament on Tuesday is shocking, British Prime Minister Theresa May said, warning that the terrorist threat to the United Kingdom remained severe.

Police said a man deliberately drove a car into pedestrians and cyclists, injuring three people, before ramming it into barriers outside Britain's parliament.

"The threat to the United Kingdom from terrorism remains severe. I would urge the public to remain vigilant," May, who is out of the country on holiday, said in a statement.

May's spokesman said she had had regular briefings with security officials throughout the day.

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