OTTAWA -- Global Affairs Canada said it is 鈥渆ngaging鈥 with Canadian officials in Austria following reports that American representatives in Vienna have been experiencing symptoms similar to the mysterious 鈥淗avana syndrome.鈥

Earlier this week, U.S. diplomats, intelligence officials and government staff reported about two dozen cases of symptoms similar to the Havana syndrome, which include nausea, dizziness, headaches and trouble concentrating.

CNN reported earlier this week that the mysterious incidents have forced a handful of American personnel in Vienna to be medically evacuated back to the U.S.

In a statement, Ciara Trudeau, a spokesperson for Global Affairs Canada, said that there have been no reports of similar cases among Canadians, but that the agency is 鈥渆ngaging鈥 with staff and other governments on the matter.

鈥淕lobal Affairs Canada maintains a strict security protocol to respond immediately to any unusual events affecting Canadian diplomats or their families posted abroad,鈥 Trudeau said in the statement.

鈥淲e continue to stay in contact with our staff and all other relevant governments in Vienna.鈥

American diplomats in Cuba first reported unexplained health effects in November 2016. Fourteen Canadians stationed therealso reported symptoms as well.

A report from December 2020 found that the mysterious injuries were likely caused by an attack of 鈥渄irected鈥 radio energy, though Cuba has denied the report.