The force on Sunday said officers swooped on two alleged marijuana growing dens in industrial building units on Sze Shan Street in Yau Tong and Ta Chuen Ping Street in Kwai Chung last week.

Inspector Cheung Wing-shum of Kwai Tsing district’s Special Duty Squad said police confiscated 733 marijuana plants, three packs of cannabis and gardening tools during the operation on Thursday and Friday.

The drugs had a market value of HK$19.9 million, she said.

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Cheung added the male suspects, aged 34 and 37, were believed to be in charge of running the two dens and were subsequently arrested on suspicion of cultivating cannabis.

The men, both Vietnamese, were holders of recognisance forms – temporary immigration documents that allow the bearers to remain in the city but not work.

Cheung said one man allegedly tried to flee during his arrest despite multiple warnings from officers, and was charged with police obstruction.

A third suspect, a 36-year-old woman, was also arrested as the tenant of both units.

Officers are still looking into the relationship between the trio.

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According to Cheung, the units were 1,300 sq ft and the 2,700 sq ft in size…