Man accused in Molotov cocktail attack of OpenAI CEO's home charged with attempted murder

SAN FRANCISCO (AP) — The man accused of throwing a Molotov cocktail at OpenAI CEO Sam Altman’s home had written about AI's purported risk to humanity and traveled from Texas to San Francisco intending to kill Altman, authorities said Monday.

Authorities allege 20-year-old Daniel Moreno-Gama threw the incendiary device about 4 a.m. Friday, setting an exterior gate at Altman’s home alight before fleeing on foot, police said. Less than an hour later, Moreno-Gama allegedly went to OpenAI’s headquarters about 3 miles (4.83 kilometers) away and threatened to burn down the building.

Moreno-Gama is opposed to artificial intelligence, writing about AI’s purported risk to humanity and “our impending extinction,” according to a federal criminal complaint.

“This was not spontaneous. This was planned, targeted and extremely serious,” said FBI San Francisco Acting Special Agent in Charge Matt Cobo during a press conference.

No one was injured at Altman's home or the company offices, authorities said.

Moreno-Gama faces charges including two counts of attempted murder and attempted arson in California state court, San Francisco District Attorney Brooke Jenkins. He tried to kill both Altman and a security guard at Altman's residence, she alleged. He is set to appear in court Tuesday, and online state court records do not yet show if he has an attorney.

Jenkins said the state charges carry penalties ranging from 19 years to life in prison.

On Monday morning, FBI agents went to Moreno-Gama’s home in Spring, Texas, a suburb of Houston, where they spent several hours before leaving. He has been charged by federal prosecutors with possession of an unregistered firearm and damage and destruction of property by means of explosives. Those charges carry respective penalties of up to 10 years and 20 years in prison.

The federal court documents do not list an attorney for Moreno-Gama, and he has not yet had his first appearance in federal court.

Authorities allege Moreno-Gama traveled from his home in Texas to San Francisco and visited Altman’s home early Friday morning.

When Moreno-Gama was arrested Friday, officials found a document on him in which he “identified views opposed to Artificial Intelligence (AI) and the executives of various AI companies,” court documents say. The document discussed AI’s purported risk to humanity and “our impending extinction,” according to the criminal complaint.

Surveillance video images included in the criminal complaint show a person dressed in a dark hoodie and pants that the FBI alleges is Moreno-Gama approaching the driveway of Altman’s home. In various images, the person can be seen tossing the Molotov cocktail, which landed at the top of a metal gate and started a small fire.

Surveillance video images from outside OpenAI’s headquarters allegedly show Moreno-Gama grabbing a chair and using it to hit a set of glass doors. Authorities said Moreno-Gama was approached by the building’s security personnel, who told investigators he “stated in sum and substance” that he came to the headquarters “to burn it down and kill anyone inside,” according to the complaint.

San Francisco police arrested Moreno-Gama and recovered “incendiary devices, a jug of kerosene, a blue lighter, and a document.” Moreno-Gama was being held Monday in the San Francisco County Jail on the state charges, and was expected to appear in court on Tuesday.

U.S. Attorney Craig Missakian said authorities “will treat this as an act of domestic terrorism, and together with our partners, prosecute him to the fullest extent of the law.”

The document in which Moreno-Gama discussed his opposition to AI also made threats against Altman, officials said.

“Also if I am going to advocate for others to kill and commit crimes, then I must lead by example and show that I am fully sincere in my message,” Moreno-Gama is alleged by authorities to have written in the document.

Advocacy groups that have issued grave warnings about AI’s risks to society condemned the violence.

Anthony Aguirre, president and CEO of the Future of Life Institute, said in a written statement Friday that “violence and intimidation of any kind have no place in the conversation about the future of AI.”

Another group, PauseAI, said in a statement that the suspect had no role in the group but joined its forum on the social media platform Discord about two years ago and posted about 34 messages there, none containing explicit calls to violence but one that was flagged as “ambiguous.”

Discord said Monday that it has banned Moreno-Gama for “off-platform behavior.”

Hours after the attack on his house, Altman posted a photo of his husband and their toddler in a blog post addressing the threats against him.

“Normally we try to be pretty private, but in this case I am sharing a photo in the hopes that it might dissuade the next person from throwing a Molotov cocktail at our house, no matter what they think about me,” Altman wrote.

He added that “fear and anxiety about AI is justified” but it was important to “de-escalate the rhetoric and tactics and try to have fewer explosions in fewer homes, figuratively and literally.”

Altman has become a preeminent voice in Silicon Valley on the promise and potential dangers of artificial intelligence. The attack comes days after The New Yorker published an in-depth investigation that touched on concerns some people have about him and the company.

The attack came at a time of growing debate about the societal effects of AI assistants like OpenAI’s ChatGPT that millions of people are turning to for information, advice, writing help and to do work on their behalf.

An annual report published Monday by Stanford University called the AI index found that most people believe AI’s benefits outweigh its drawbacks, “but nervousness is growing and trust in institutions to manage the technology remains uneven.”

Lozano reported from Houston and Oyekanmi reported from Spring, Texas. Associated Press journalists Matt O'Brien from Providence, Rhode Island and Rebecca Boone from Boise, Idaho contributed.

San Francisco District Attorney Brooke Jenkins speaks during a news conference Monday, April 13, 2026, in San Francisco. (AP Photo/Jeff Chiu)

Matt Cobo, F.B.I. San Francisco Acting Special Agent in Charge, right, speaks next to San Francisco District Attorney Brooke Jenkins during a news conference Monday, April 13, 2026, in San Francisco. (AP Photo/Jeff Chiu)

Matt Cobo, F.B.I. San Francisco Acting Special Agent in Charge, right, speaks next to San Francisco Police Chief Derrick Lew, second from right, and San Francisco District Attorney Brooke Jenkins, third from right, during a news conference Monday, April 13, 2026, in San Francisco. (AP Photo/Jeff Chiu)

The home of Daniel Moreno-Gama is seen after the FBI raided his home in Spring, Texas, Monday, April 13, 2026. (Jason Fochtman/Houston Chronicle via AP)

The home of Daniel Moreno-Gama is seen after the FBI raided his home in Spring, Texas, Monday, April 13, 2026. (Jason Fochtman/Houston Chronicle via AP)

A man running from an encounter with immigration and other federal agents in Florida was struck and killed by a tractor trailer on Tuesday, authorities said.

It was the third death in a week involving encounters with U.S. Immigration and Customs Enforcement agents, following shootings in Texas and Maine.

The 28-year-old was among four occupants of a vehicle that stopped in the parking lot of a gas station and convenience store in the St. Augustine area before 7 a.m. During an encounter with agents from ICE and Homeland Security Investigations, the four fled on foot, with one darting across a busy road into the path of the semi, Florida Highway Patrol Sgt. Dylan Bryan said in an emailed statement.

The driver of the semi stopped and tried to help the man, Bryan said.

It was at least the 10th death involving encounters with immigration agents since President Donald Trump launched his mass deportation campaign last year.

It wasn’t immediately clear what prompted the encounter Tuesday. In an emailed statement, the Department of Homeland Security confirmed it had conducted an operation and said the Florida Highway Patrol and Homeland Security Investigations were “investigating an incident resulting in the death of a Mexican national.”

The department did not respond to an inquiry from The Associated Press about the status of the other three occupants of the vehicle.

State Rep. Angie Nixon, a Democrat from Jacksonville, called the death a tragedy that resulted from an out-of-control agency.

“Whether it’s ICE agents gunning down a father in the streets of Houston, shooting a young man in Maine or conducting operations right here in Northeast Florida that result in a deadly crash, the outcome is the same: fear, chaos and death,” she said.

In two other cases, people died after fleeing agents and being struck by vehicles.

Last summer, a man running from immigration officers outside a Home Depot store in southern California died after being hit by an SUV as he tried to cross a freeway. Homeland Security officials said that 52-year-old Roberto Carlos Montoya Valdez, of Guatemala, was not being pursued by immigration authorities when he was struck.

In October, a pickup truck fatally struck 24-year-old gardener Josué Castro Rivera, of Honduras, on a highway in Norfolk, Virginia, as he tried to escape authorities during a traffic stop. Authorities said Castro Rivera’s vehicle was stopped as part of a “targeted, intelligence-based” operation and that Castro Rivera had “resisted heavily and fled.”

The Mexican government on Tuesday said it had asked state attorneys general in the U.S. to review the deaths of migrants in ICE custody or during raids for possible criminal prosecution.

In this photo provided by the St. Johns County Sheriff's Office, the eastbound lanes of SR 16 between Outlet Mall Boulevard and Inman Road in St. Augustine, Fla., are shutdown after a fatal collision. (St. Johns County Sheriff's Office via AP)