Eliza Peppel

Just after 4 a.m.

this morning, police responded to an incident in San Francisco's North Beach neighborhood.

A 20-year-old man had thrown a Molotov cocktail at Sam Altman's home, setting fire to an outer gate.

The suspect then fled on foot.

An hour later, he was arrested outside OpenAI's offices after threatening to burn down the building.

That's according to San Francisco police and a statement released by OpenAI.

No injuries were reported.

An investigation into the incident is ongoing.

For NPR News, I'm Eliza Pepl in San Francisco.