LONDON (AP) — Two military horses that bolted and ran miles through the streets of London after being spooked by construction noise and tossing their riders were in a serious condition and required operations, a British government official said Thursday.

The animals were among a group of four horses that broke free during routine exercises Wednesday near Buckingham Palace, tossing their riders and causing chaos as they galloped loose through central London streets during the morning rush hour. A fifth horse that tried to bolt had not been able to break free.

Two of the horses required operations and one was transferred to an equine hospital, the British Army said on X, the social media platform.

“Three of them are fine, two of them are unfortunately in a relatively serious condition and obviously we will be monitoring that condition,” defense minister James Cartlidge told Sky News. “They are in a serious condition, but as I understand, still alive.”