Cuba: Canadian diplomat struck by headaches and hearing loss

http://www.bbc.com/news/world-us-canada-40894444
It comes a day after the US said its diplomats in Havana were experiencing strange physical symptoms.

Reports suggest the envoys could have been targeted by a covert sonic device that causes hearing loss.

Havana denies the allegation, but the US has removed two Cuban diplomats from Washington DC in retaliation.

"Cuba has never, nor would ever, allow the Cuban territory to be used for any kind of action against accredited diplomats or their families," Cuba's foreign ministry said.

The Associated Press reported that a US investigation determined that the American diplomats' hearing loss could have been linked to sonic devices which emit inaudible sound waves that can cause deafness.

US officials, speaking to the agency anonymously, said investigations had determined devices had been deployed either inside or outside diplomats' homes.

Investigators are also considering the possibility that a third country, such as Russia, was behind the incidents, officials familiar with the inquiry told AP.

If true, the use of sonic devices to cause harm to diplomats would be unprecedented.