Incident could indicate an increasingly chilly reception for some American visitors . The U.S. Embassy in Moscow said it was aware of the incident and is working with local authorities to investigate it. Cuban authorities put five back on plane to Mexico ; rest spend night on airport floor . In another recent incident , an American contractor was detained .
Incident could indicate an increasingly chilly reception for some American visitors . Group traveling on a U.S.-issued license , planned to do humanitarian work . Cuban authorities put five back on plane to Mexico ; rest spend night on airport floor . In another recent incident , an American contractor was detained .