Elon Musk has reacted to the death of a San Francisco cat that was killed by a Waymo driverless vehicle. KitKat, a nine-year-old cat who lived at Randa’s Market in San Francisco, was run over by a self-driving Waymo car on Monday.

“Honestly, man, it’s difficult. He was a one-of-a-kind cat. He brought joy to so many people,” Zeidan told The San Francisco Standard.