A 20-year-old man was arrested early Friday after allegedly throwing an incendiary device at a North Beach home belonging to OpenAI CEO Sam Altman. 

Open AI spokesperson Jamie Radice confirmed to SFGATE that Friday morning, Sam Altman’s North Beach home had been attacked with a “Molotov cocktail” and threats had been made against the company’s San Francisco headquarters.

“Thankfully, no one was hurt,” Radice said in a statement. “We deeply appreciate how quickly SFPD responded and the support from the city in helping keep our employees safe. The individual is in custody, and we’re assisting law enforcement with their investigation.”

San Francisco police responded at 4:12 a.m. on April 10 to a North Beach residence for a reported fire investigation, SFPD spokesperson Allison Maxie told SFGATE in a statement. 

“At the scene, officers learned that an unknown male subject threw an incendiary destructive device at a home, causing a fire to an exterior gate,” Maxie said. “The suspect then fled on foot.”

No injuries were reported. Police broadcast the suspect’s description to officers citywide.

Shortly after 5 a.m., officers were called to a business on the 1400 block of Third Street, where Open AI’s headquarters are, for a report of a man “threatening to burn down the building,” Maxie said. Responding officers recognized the individual as the same suspect from the earlier scene and “immediately detained him.”

They arrested the man, and his charges are pending as of Friday.