The FBI has launched an investigation into a series of deaths and disappearances involving U.S. scientists, raising new concerns about potential connections between the cases.
According to a statement, the bureau is leading a multi-agency effort alongside the Department of Energy and other federal and local partners to determine whether the incidents are linked. Officials have not yet confirmed any conclusions but say the matter is being treated seriously.
The probe comes after reports surfaced that roughly 10 scientists have either gone missing or died in recent years—some of whom were reportedly involved in advanced aerospace or nuclear-related research.
President Donald Trump recently addressed the issue, calling the cases “serious” and noting that several of the individuals were “very important people.” He expressed hope that the incidents are unrelated but acknowledged the need for further investigation.
White House press secretary Karoline Leavitt also indicated the administration is reviewing the situation, saying that if the reports are accurate, they would warrant attention at the highest levels of government.
Several lawmakers have voiced concern, suggesting the number of cases may be unusually high. Rep. Eric Burlison (R-MO) and Rep. Tim Burchett (R-TN) have both called for closer scrutiny, pointing to patterns among researchers working in highly sensitive fields.
One case drawing particular attention is that of retired Air Force General William McCasland, who reportedly vanished from his New Mexico home earlier this year. Another involves a rocket scientist who disappeared while hiking in California.
Despite the growing scrutiny, NASA said this week there is currently no evidence suggesting a national security threat. The agency added that it is cooperating with federal authorities and will provide updates as more information becomes available.
The investigation remains ongoing.

