A man accused of throwing a lit Molotov cocktail at the home of OpenAI CEO Sam Altman’s home last week was trying to kill him, and was motivated by hatred of artificial intelligence technology, prosecutors said Monday.

The suspect, Daniel Moreno-Gama, is being charged with attempted murder in the case, the San Francisco District Attorney said on Monday. Moreno-Gama is also facing federal charges, including attempted damage and destruction of property by means of explosives and possession of an unregistered firearm, according to a release from the Department of Justice.

“The charges announced today reflect a deeply concerning escalation from intent to action targeting a private residence and a technology company with violence,” FBI Acting Special Agent in Charge Matt Cobo said in a statement.

In a press conference on Monday, Cobo said, “This was not spontaneous. This was planned, targeted and extremely serious.”

After Moreno-Gama was arrested following his attack on Friday, San Francisco Police Department officers recovered a document in his possession that detailed his intentions, according to a complaint filed in San Francisco federal court on Monday. Moreno-Gama expressed his aim to kill Altman and warned of humanity’s “impending extinction” from AI.