NEW: Search For Missing Nuclear Scientists Escalates As Lawmakers Issue Ominous Warning

Congressional Republicans are demanding a sweeping federal investigation into a growing list of deaths and disappearances involving U.S. scientists and officials linked to sensitive research, warning the cases could point to a serious national security threat.

Lawmakers say at least 11 people with ties to NASA, nuclear research, aerospace programs and other classified work have vanished or turned up dead in recent years. Several of the cases involve personnel connected to major facilities such as NASA’s Jet Propulsion Laboratory and Los Alamos National Laboratory, where work can involve sensitive information tied to space missions, nuclear technology and advanced defense systems.

Now Congress wants answers.

‘The Committee on Oversight and Government Reform is investigating recent unconfirmed public reporting on the disappearance and death of individuals with access to sensitive U.S. scientific information,’ Republican Chairman James Comer wrote in letters seeking action from the FBI, Pentagon, NASA and the Department of Energy.

‘These reports allege that at least ten individuals who “had a connection to U.S. nuclear secrets or rocket technology,” have “died or mysteriously vanished in recent years,”’ the letters continued. ‘If the reports are accurate, these deaths and disappearances may represent a grave threat to U.S. national security and to U.S. personnel with access to scientific secrets.’

Comer also pointed to what he described as a ‘possible sinister connection between a string of mysterious deaths and disappearances which began in 2023.’

President Donald Trump said he was briefed on the cases and suggested the administration expects more clarity soon.

‘Well, I hope it is random, but we are going to know in the next week and a half,’ Trump said when asked about the missing scientists.

‘I just left a meeting on that subject, so pretty serious stuff. Hopefully, coincidence… but some of them were very important people, and we are going to look at it.’

Comer and Republican Rep. Eric Burlison, who also signed the letters, demanded the agencies provide briefings to Congress no later than April 27.

When lawmakers sought more information, the Department of War responded last week by saying ‘there are no active national security investigations of any reported missing person.’

The renewed push comes as attention has centered on the Feb. 28 disappearance of retired Air Force Maj. Gen. William “Neil” McCasland. He was last seen leaving his New Mexico home without his phone, wearable devices or glasses, carrying only a pistol. His wife told 911 dispatchers it appeared he was trying ‘not to be found.’

Lawmakers and online sleuths have also pointed to a cluster of Southwest cases with similar details, including Steven Garcia, 48, who vanished after leaving his Albuquerque home on foot without basic essentials, carrying only a handgun. The Daily Mail cited an anonymous source claiming Garcia worked as a government contractor tied to the Kansas City National Security Campus, a facility involved in components for U.S. nuclear weapons systems.

RELATED: NEW: 11th Scientist Linked To Chilling Pattern Of Missing, Dead Officials With Access To US Secrets

Another case drawing scrutiny is that of Monica Jacinto Reza, 60, who disappeared while hiking in California on June 22 of last year. She had recently become the director of the Materials Processing Group at NASA’s Jet Propulsion Laboratory and was tied to research involving specialized materials for aerospace applications.

Two Los Alamos-linked disappearances have also been repeatedly cited: Anthony Chavez, 79, who worked at the lab until retiring in 2017, and Melissa Casias, 54, an administrative assistant believed to have held high-level access. Both vanished in 2025 under circumstances described as unusual.

MORE ON THE MISSING SCIENTISTS: NEW: Tenth Nuclear Official Goes Missing In Continuation Of ‘Dark Pattern’ Tied To US Facilities

White House press secretary Karoline Leavitt said the administration is now treating the questions as legitimate and is coordinating across agencies.

‘In light of the recent and legitimate questions about these troubling cases, and President Trump’s commitment to the truth, the White House is actively working with all relevant agencies and the FBI to holistically review all of the cases together and identify any potential commonalities that may exist,’ Leavitt said.

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