A "troika of tyranny". That is how the US National Security Advisor John Bolton described Cuba, Nicaragua and Venezuela, after announcing new sanctions on all three countries.

The Trump administration's move reverses the measures former President Barack Obama made to better ties with Cuba during his last few months in office.

European leaders have expressed their concern over the United States's sanctions on Cuba's military and intelligence services, saying this had the potential to create a huge international dispute.

Al Jazeera's Alan Fisher reports.

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