A man was arrested on Friday after throwing a Molotov cocktail at the San Francisco home of OpenAI CEO Sam Altman. OpenAI confirmed that no one was injured in the early morning attack and expressed gratitude to the San Francisco Police Department for its swift response. The company also reported that threats were made to its headquarters in the city around the same time.

According to the San Francisco Chronicle, firefighters responded to a fire at Altman’s residence just before 4 a.m., which security guards had already extinguished at the property’s exterior gate. The suspect fled before firefighters arrived. About an hour later, police responded to reports of a man threatening to burn down the building housing OpenAI’s headquarters and identified him as the same individual involved in the earlier incident.

The 20-year-old suspect has not been publicly identified, and no charges have yet been filed. OpenAI spokesperson Jamie Radice said the company is cooperating with law enforcement in the ongoing investigation.