A 20-year-old man was arrested Friday after throwing a molotov cocktail at OpenAI CEO Sam Altman’s home in San Francisco and threatening to set fire to the company’s headquarters.
The incident happened at around 4 a.m. local time in San Francisco’s Russian Hill neighborhood. The suspect threw an incendiary device at Altman’s home, which started a fire at an exterior gate.

No one was injured. OpenAI confirmed the attack in a statement to Forbes, saying property damage was “minimal.”
San Francisco police responded to a second incident roughly an hour later. A suspect threatened to burn down a building on the 1400 block of Third Street. OpenAI’s headquarters are located at 1455 Third Street.
Officers identified the second suspect as the same person from the earlier attack at Altman’s home. He was detained and charges are still pending. The investigation is ongoing.
OpenAI sent a memo to staff confirming both incidents. The company said all of its San Francisco offices were open Friday and that police and security presence around its buildings had been increased.
Altman addressed the incident in a post on his personal blog Friday. He acknowledged that public criticism of the AI industry often comes from “sincere concern about the incredibly high stakes of this technology.”
The attack came just days after the New Yorker published a year-long investigation into Altman. The piece portrayed him as an ethically untrustworthy leader in the AI race.
The timing follows growing public and legal pressure on Altman. Elon Musk is also seeking to have Altman removed from OpenAI over fraud claims.
OpenAI confirmed it is cooperating fully with the police investigation. The San Francisco Police Department said charges against the suspect are still pending as of Friday.
The suspect was able to approach Altman’s residence without reported interference before throwing the device. Police have not yet released the suspect’s name or stated a motive publicly.
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