Spy versus Spy in the 20th century.
Via FreeBeacon:
Some United States government personnel on official duty in Havana, Cuba have reported feeling a variety of “physical symptoms” following “incidents,” according to a State Department spokesperson.
There are concerns about the safety of these diplomats, and the FBI is currently investigating the matter, CBS Radio News reports. The U.S. responded by asking two Cuban officials in the U.S. to leave the country on May 23.