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\"PHOTO:
Jack Taylor/Getty Images
PHOTO: Members of the public look on as roads are closed off by Police around Westminster Bridge and the Houses of Parliament during an incident on March 22, 2017 in London.
>

This evening, London Mayor Sadiq Khan said in a statement that \"there will be additional armed and unarmed police officers on our streets from tonight in order to keep Londoners, and all those visiting our city, safe.\"

\"I want to reassure all Londoners, and all our visitors, not to be alarmed. Our city remains one of the safest in the world,\" Khan said. \"London is the greatest city in the world, and we stand together in the face of those who seek to harm us and destroy our way of life. We always have, and we always will. Londoners will never be cowed by terrorism.”

Police said the flag over Scotland Yard would be flown at half-mast this evening in honor of the victims.

Flag at half-mast over Scotland Yard tonight to mark the death of our officer & the other victims of this afternoon’s attack in #Westminster pic.twitter.com/NqaGSqJtmt

— Metropolitan Police (@metpoliceuk) March 22, 2017

Mark Rowley of the Metropolitan Police said, \"This is a day we plan for, but hope it will never happen. Sadly, it is now a reality.\"

\"We will continue to do all we can to protect the people of London.\"

\"PHOTO:
Toby Melville/Reuters
PHOTO: A woman assists an injured person after an incident on Westminster Bridge in London, March 22, 2017.
>

Anyone with videos or images from the incident is asked to turn them over to police.

\"PHOTO:
Daniel Leal-Olivas/AFP/Getty Images
PHOTO: Armed police officers stand guard a grey vehicle that crashed into the railings of the Houses of Parliament in central London on March 22, 2017.
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