Tokyo ( CNN ) -- A U.S. Navy sailor has been found dead with a head injury at a Japanese train station , local police said Monday . Petty Officer 2nd Class Samuel Lewis Stiles was discovered surrounded by seven or eight alcoholic drink cans on the platform in Haiki Station in Nagasaki Prefecture at 5 a.m. Sunday , Haiki police said . The death , which police say they are investigating as either an accident or a crime , comes at a delicate time for the U.S. military in Japan after two U.S. sailors were arrested earlier this month on accusations they raped a local woman . That case provoked an angry reaction from Japanese officials , and the U.S. military responded by imposing a curfew on its troops in Japan . The curfew restricted military personnel to bases , personal homes or hotels between 11 p.m. and 5 a.m . The time at which Stiles 's body was found suggests he may have been out in breach of this curfew . He was wearing civilian clothes , not uniform , and did n't have any personal belonging around him , police said . Stiles was stationed at the U.S. base in Sasebo , the city in Nagasaki where Haiki Station is situated .
The sailor is found on a station platform . Police are investigating the death as either an accident or a crime . It comes after the U.S. military imposed a curfew on troops in Japan .