BERLIN—At least two U.S. officials stationed in Germany sought medical treatment after developing symptoms of the mysterious health complaint known as Havana Syndrome, U.S. diplomats said.
The symptoms, which included nausea, severe headaches, ear pain, fatigue, insomnia and sluggishness, began to emerge in recent months and some victims were left unable to work, the diplomats said. They are the first cases to be reported in a NATO country that hosts U.S. troops and nuclear weapons.
U.S. diplomats said similar incidents had been registered among American officials stationed in other European nations, but declined to provide any detail.
Some victims were intelligence officers or diplomats working on Russia-related issues such as gas exports, cybersecurity and political interference, U.S. diplomats and people familiar with an investigation into the illness said.
NBC News reported in July about at least one Havana Syndrome case among Berlin-based U.S. diplomats.