Two German teenagers were reportedly detained by federal customs officers while attempting to enter Hawaii by plane and were kicked out of the United States after authorities deemed their trip “suspicious.” This is the latest in a string of incidents involving German tourists.

German citizens, Charlotte Pohl, 19, and Maria Lepere, 18, arrived in Hawaii on March 18 with plans to travel around the U.S. for five weeks as a celebratory trip following high school graduation, according to the German outlet Ostsee Zeitung. They then set their sights on visiting California before heading south to Costa Rica in Central America.