The FBI says there is currently no evidence connecting a series ofmissing and deceased US scientists, despite growing online speculation about a coordinated plot.

The claims involve researchers linked to institutions such asNASA's Jet Propulsion Laboratory and Los Alamos National Laboratory, but officials, including the FBI and NASA, have said there is no confirmed sign of a broader threat or organised targeting.

Currently, federal agencies are still looking into several separate cases involving scientists across different US states and time periods. Some people have gone missing, others have died with different official explanations, and a number of cases are still not fully resolved.

Officials say the situations don't look the same, and they happen in different places, so there's no clear reason yet to link them together.

The issue gained more attention after several of these cases were talked about online one after another. That led some people on social media to suggest there might be a pattern, with theories claiming scientists working on sensitive government research could be being targeted.

Retired FBI Special Agent Jennifer Coffindaffer has pushed back strongly on suggestions of coordinated foul play, arguing that the available information does not form a consistent pattern.

She toldNewsweekthat people often build conspiracies by pulling together unrelated incidents. In her view, removing personal and case-by-case context can make separate tragedies appear connected when they are not.

Coffindaffer used simple statistics to explain her view. She said that when you look at different cases together, it can seem worrying at first, even if they are not actually connected. In many jobs and professions, unrelated deaths or disappearances can happen around the same time by coincidence, which can make patterns look stronger than they really are.

She added that if there were a real organised conspiracy, investigators would usually expect to see clear similarities. That could mean the same type of victims, similar job roles, or the same method being used again and again. But in these cases, she said, that is not what appears to be happening.

Instead, the people involved come from very different backgrounds and workplaces. Some work in space and astrophysics, others in aerospace or government labs, and some in completely different roles like administration or contracting.

Source: International Business Times UK