It’s been awhile since we heard anything about “Havana Syndrome,” the bizarre brain malady supposedly impacting droves of U.S. service members all over the world. Now, a new report suggests that the Central Intelligence Agency recently helped derail a government probe into the phenomenon.

The National Health Institute has been researching the bizarre health incidents but has now said that it will end that research “out of an abundance of caution.” According to a report from CNN, the research is being halted because an internal probe of the program found that some research subjects had been “coerced” into participating in the program. Forced participation in research is considered deeply unethical. CNN also notes that some participants in the program had “previously claimed that the CIA made them join the research as a prerequisite for getting health care.”