New intelligence about weapons research by American adversaries opens the possibility of a foreign actor behind the mysterious ailments that have injured hundreds of U.S. personnel serving overseas.

Five agencies concluded it was unlikely a foreign adversary was behind the incidents, while two came to a different conclusion.

New intelligence has led two US intelligence agencies to conclude that it’s possible a small number of mysterious health ailments colloquially termed as Havana Syndrome impacting spies, soldiers and diplomats around the world may have been caused by a “novel weapon” wielded by a foreign actor,