Canadian researchers say they may have identified the cause of a mystery illness which plagued diplomatic staff in Cuba in 2016.
Some reports in the US suggested an "acoustic attack" caused US staff similar symptoms, sparking speculation about a secret sonic weapon.
But the Canadian team suggests that neurotoxins from mosquito fumigation are the more likely cause.
The Zika virus, carried by mosquitoes, was a significant health concern at the time.
So-called "Havana syndrome" caused symptoms including headaches, blurred vision, dizziness and tinnitus.
It made international headlines when the US announced more than a dozen staff from its Cuban embassy were being treated.
Cuba denied any suggestion of "attacks", and the reports led to increased tension between the two nations.
In July, a US academic study showed "brain abnormalities" in diplomats working at the Cuban Consulate. So retuning to our main article title Cuban sonic weapon probably caused by mosquito gas it does look like the common mosquito is quite a dangerous insect after all.
Steve S