US envoys, families in Cuba targeted nearly 50 days by sonic attacks, says US official

Havana, Cuba( CNN) Some of the 21 US diplomats believed to have been impacted by mysteriousacoustic assaults in Cuba were targeted multiple times, CNN has learned from a senior US official.

There were nearly 50 attacks in total, the official said.

The incidents have challenged the US government’s assessment that Cuba is a safe country for US diplomats and their families and threatened the future of the newly reopened embassy.