A 42-year-old man died after falling during a police operation in Mong Kok on October 25. He was found unconscious and taken by ambulance to Kwong Wah Hospital, where he died despite treatment.
The Organized Crime and Triad Bureau searched a tenement unit at 387 Reclamation Street at about 9pm. The unit was suspected of being a drug-use centre.
Reports said the man may have been trying to escape during the operation and fell from the rooftop. The circumstances of the fall remained under investigation.
Police took more than 20 people from the building away for investigation.