A man has been arrested as a suspect in setting the Pacific Palisades fire in Los Angeles that killed 12 people and destroyed more than 6,000 homes in January.
Justice department officials announced at a news conference that 29-year-old Jonathan Rinderknecht had been detained.
They said evidence collected from his digital devices showed an image he generated on ChatGPT depicting a burning city.
The fire was sparked on 7 January near a popular hiking trail overlooking the wealthy coastal neighbourhood. The Eaton Fire, ignited the same day in the Los Angeles area, killed another 19 people and destroyed about 9,400 structures, officials said. The cause of that fire remains unclear.