A suspect is in custody after a Molotov cocktail attack at Sam Altman's home, Reuters reports.

That's about all anyone knows. The motive isn't public. Neither is the suspect's identity.

The incident comes during a tense stretch for OpenAI. The company has been moving fast on AI development, drawing regulatory scrutiny from regulators and vocal criticism from plenty of corners. Altman has become one of the most recognizable figures in tech. Other AI executives have faced threats and harassment as the debate over AI has intensified.

What drove this attack, and whether it's connected to Altman's work, remains unknown.