CIA and State Department officials face increased Havana Syndrome attacks

The CIA was forced to evacuate an official with injuries consistent with Havana Syndrome

The most recent incident in Serbia is part of what officials have called an expansion of similar attacks on U.S. spies and diplomats stationed in overseas locations. Who is perpetrating the attacks remains a mystery, though government officials and scientists believe the assailants are using what they described as a "directed-energy source."

The attacks have happened at multiple locations overseas and in the U.S. and have become more common.