Canada spied for the US in Cuba during the "Havana Syndrome" incidents, according to media reports.

Between 2016 and 2018, Canadian diplomats in Cuba gathered intelligence and shared it with United States agents. This activity occurred concurrently with the emergence of unexplained health issues known as the 'Havana syndrome'.

The intelligence sharing took place in Cuba during a period marked by mysterious medical incidents affecting diplomatic personnel. The reports highlight the cooperative intelligence efforts between Canadian and American officials as these health anomalies first appeared.