Hong Kong's seasonally adjusted unemployment rate fell to 3.8% in the December to February, from 3.9% in the previous three-month period, the government said on Wednesday, with decreases mainly in retail, accommodation services, foundation and superstructure sectors. "The sustained growth momentum of the Hong Kong economy should continue to support the overall labour market," Chris Sun, secretary for labour and welfare, said in a statement, adding employment situations in some local sectors may still face challenges due to their business performances.