Police have arrested 802 men and 767 women suspected to be connected with various serious crimes.

The arrests were made during several operations against organised crime from September 1 to 8, and saw co-operation from Guangdong and Macau police.

Officers raided more than 2,000 locations, including discos, games centres, massage parlours and residences, and shutdown 23 vice establishments, 18 gambling dens, six drug dens and nine pirated disc centres.

About 190 grams of heroin, 1,700 ecstasy pills and 200 grams of ketamine, were seized along with weapons like wooden poles and knives, and $3.2 million worth of betting slips and $220,000 in cash.

More than 160,000 obscene or pirated optical discs, 9,500 litres of illicit oil and about 3.9 million dutiable cigarettes were also found.