Investigators have chased many theories, including a sonic attack, electromagnetic weapon or flawed spying device.
This follows a string of unexplained incidents harming the health of American diplomats in Cuba, Secretary of State Rex Tillerson says.
Information on exactly where the U.S. tourists were from was not immediately available.
London police say a second man has been arrested in connection with the London subway attack.
Police say the man has been arrested by Kent police in the port area of Dover on the English Channel.
The week-long trip was his first official visit to the country.
The Vatican declined to identify the diplomat.
The London Ambulance Service says 18 people have been taken to hospitals with injuries, not thought to be life-threatening
The evacuation comes after police responded to “an incident” at the Parsons Green station during Friday rush hour.
South Korea’s Joint Chiefs of Staff said Friday that the missile was launched from Sunan, the site of Pyongyang’s international airport.
Heavy monsoon rains have flooded rivers in parts of India, where boats are often the main mode of transport in remote areas.
Police have arrested the CEO of the world’s largest meatpacker on suspicion of manipulating financial markets.
Wilson, best known for the comedies “Pitch Perfect” and “Bridesmaids,” was in London on Wednesday and her lawyers were unable to immediately…
Brazilian prosecutors are investigating reports that gold prospectors may have killed members of a so-called uncontacted tribe in the Amazon…