Windsor, UK - A tragic accident occurred in front of King Charles III during a military demonstration in Windsor on Friday: a soldier fell from his horse and suffered such serious injuries that he died on the scene.

The accident occurred in the evening during the Royal Windsor Horse Show in Berkshire, which was also attended by King Charles and his brother, Prince Edward, and his wife.

As the BBC reported, citing information from the Thames Valley Police, the soldier from the King's Troop, Royal Horse Artillery, was about to leave the arena on his horse after a performance.

But the military rider fell from the animal for reasons as yet unknown.

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He is said to have received immediate medical attention, but his injuries were so severe that he died on the spot.

"It is with deep regret that we announce a member of The King's Troop Royal Horse Artillery died on Friday 15 May, following a tragic incident at the Royal Windsor Horse Show," the military confirmed.

The rider's family has been notified.

Members of the royal family were also present in the arena when the accident occurred, although they were not informed of the tragic outcome until later.

A spokesperson for the palace said King Charles was "shocked and saddened" by the sudden tragedy and plans to reach out to the rider's family to offer his condolences.