Startling new details have emerged in the Cuban “sonic harassment attacks”, with reports suggesting that diplomats were targeted in specific rooms or even a part of a specific room.

The state department said earlier this week that 21 US diplomats are now known to be affected, and several Canadians. British diplomats are not believed to have been affected by the incidents, which mainly took place in the autumn of 2016 until the spring of this year.

One new incident, though, reported on September 1, took place in August.