HONG KONG - Hong Kong police announced Monday they had detained 15 Hong Kong residents in connection with a robbery of about ¥1 billion in cash in central Hong Kong. Police said the stolen cash has not been recovered. According to the announcement, the robbery occurred at around 9 a.m. on Thursday in Sheung Wan, Hong Kong Island. Two Chinese employees of a Japanese company that deals in cryptocurrency and luxury apparel were robbed while en route to exchange currency. They were carrying the Japanese currency in four suitcases.