In Pictures: British Parliament Attack

A police officer has been stabbed at Westminster, with “reports of further violent incidents in the vicinity”.

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Police tape off Parliament Square after reports of loud bangs.

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Police officers surround two individuals on the ground inside the gates of the houses of parliament.

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Stefan Rousseau / PA

A policeman points a gun at a man on the floor as emergency services attend the scene outside the Palace of Westminster. A knife appears to be under his foot.

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Conservative MP Tobias Ellwood (centre) helps emergency services attend to a police officer outside the Palace of Westminster.

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Armed police at the scene outside the Palace of Westminster, London.

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Emergency services at the scene outside the Palace of Westminster.

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Daniel Leal-olivas / AFP / Getty Images

People leave after being evacuated from the houses of parliament.

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Armed police officers enter the houses of parliament.

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Firearms incident in the Westminster palace grounds and on Westminster Bridge.

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An armed police officer stands on Parliament Square.

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Injured people are assisted after an incident on Westminster Bridge in London.

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Paramedics treat an inured person after an incident on Westminster Bridge.

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A member of the public is treated by emergency services near Westminster Bridge.

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Armed police officers stand guard on the corner of Parliament Square.

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Ambulances stand with other emergency service vehicles on Westminster Bridge.

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A paramedic in body armour runs down Westminster Bridge.

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Nurses from St Thomas' hospital load blankets outside the hospital.

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Assistant Commissioner, Mark Rowley of the Metropolitan Police makes a statement outside of New Scotland Yard.

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The flag at New Scotland Yard flown at half mast following the day's events in Westminster.

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Prime Minister Theresa May makes a statement in Downing street.