Police : Ketamine is the top drug of choice among young people in Hong Kong . Drug use among those under 21 has jumped 57 percent in the last four years . Police stepping up crackdowns , say parks and public toilets hot spots for drug use . `` Just look at our school development . Comment:
Police : Ketamine is the top drug of choice among young people in Hong Kong . Drug use among those under 21 has jumped 57 percent in the last four years . Police stepping up crackdowns , say parks and public toilets hot spots for drug use . Comment: