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,

Two U.S. intelligence agencies investigating a series of unexplained health incidents among U.S. government officials believe it is possible that foreign adversaries have developed advanced technology that could be responsible for the symptoms.

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.

Two of seven US intelligence agencies broke with previous assessments that foreign adversaries were not to blame for so-far unexplained health incidents among government employees overseas that came to be known as “Havana Syndrome.

Contradicting what U.S. spy agencies have publicly said, senior National Security Council officials told a group of Havana Syndrome victims in a meeting at the White House that they have seen information that undercuts the intelligence community’s assessment that no foreign adversary was behind the incidents.

The ailments were first reported by personnel at the U.S. embassy in Havana in 2016, leading to suspicions they might have been deliberately caused by a foreign power, or by non-state foreign attackers.

The intelligence report, written chiefly by the CIA, appeared to close the book on Havana syndrome. Turns out, it didn’t. New information has come to light causing some in the intelligence community to adjust their previous conclusions.