A Texas man accused of throwing a Molotov cocktail at the San Francisco home of OpenAI boss Sam Altman is facing multiple state charges, including two counts of attempted murder.

Daniel Moreno-Gama is scheduled to hear those charges at an arraignment on Tuesday afternoon.

At the same time, the 20-year-old is facing federal felony charges that include possession of an unregistered firearm and attempted damage and destruction of property using explosives.

The US justice department alleges he was found with documents advocating against artificial intelligence (AI) and calling for crimes to be committed against AI executives and investors.

"Violence cannot be the norm for expressing disagreement, be it with politics or a technology or any other matter," said Acting Attorney General Todd Blanche. "These alleged actions – which damaged property and could well have taken lives – will be aggressively prosecuted."