US, Cuba to meet on mysterious 'health attacks' in Havana

National security agencies and members of Congress are frustrated by the lack of answers about what the United States describes as "health attacks" that have injured American diplomats in Cuba.

A meeting Thursday between US and Cuban officials was intended to try to help determine the method and motive behind those mysterious incidents that began nearly two years ago and have affected about two dozen people, including some diagnosed with brain damage.

A flurry of reports has suggesting investigators have narrowed their suspicions as to the cause and culprit.

The planned meeting is "part of our ongoing effort to investigate and better understand the health conditions of our diplomats," the State Department said.

It said the Cuban delegation would "receive a general medical briefing about the injuries experienced by US personnel who served in Havana."