UPDATE- Four people dead following attacks in London

Four people, including a police officer have been confirmed dead following a terrorist attack in Westminster in London.

The incident unfolded shortly before three o'clock this afternoon, when a car mounted the pavement on Westminster Bridge and drove into pedestrians.

The car then drove to the Houses of Parliament where a man entered the compound, stabbing at least one police officer.

He was then shot by police and has since died.

Mark Rowley is the Head of Counter-terrorism and Assistant Commissioner of the Met Police:

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