A woman has been left injured after a collision with a convoy escorting the Duke and Duchess of Cambridge.
The 83-year-old woman is in hospital and is in a serious but stable condition.
On Monday, William and Kate were on their way to attend the Order of the Garter service in Windsor when a marked police motorbike in their convoy was involved in a collision with the woman on Upper Richmond Road, south-west London.
It appears the lady was crossing the road when the accident happened.
Kensington Palace has said Kate and William are "deeply concerned and saddened" by what happened.
The royal couple have also been in touch with the woman, who has been identified as Irene Mayor.
It's been said that Kate and William also sent flowers to Irene.
It is not known at this stage who was at fault for the collision.
William and Kate reportedly did not see the accident at the time and their police teams decided to keep driving to Windsor while other officers stayed at the scene.
The Independent Office for Police Conduct (IOPC), which is investigating the accident said: "The woman, in her 80s, suffered serious injuries and was taken to a London hospital where she remains in a serious but stable condition.
The Duke and Duchess of Cambridge were deeply concerned and saddened to hear about the accident on Monday afternoon.
"In line with procedure, the Metropolitan Police Service referred the collision to the IOPC.
"Our staff attended the scene of the incident and after careful consideration, we have launched an independent investigation.
"The investigation is in its very early stages and the officer involved is assisting our enquiries as a witness.
"Our immediate thoughts are with the injured woman and her family and those affected by the incident."
Kensington Palace said: "The Duke and Duchess of Cambridge were deeply concerned and saddened to hear about the accident on Monday afternoon.
"Their Royal Highnesses have sent their very best wishes to Irene and her family and will stay in touch throughout every stage of her recovery."
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