Hong Kong police have arrested a woman on suspicion of murder after the bodies of her mother and middle-aged brother were found in a flat in Cheung Sha Wan.

The case came to light at around 3.50pm on Monday when authorities received a call that a man, 48, had been found unconscious in a flat in the Hang Moon Building on Cheung Sha Wan Road.

Firefighters arrived and entered the flat, where they found the bodies of the man and his mother, 85.

A police source said the mother had injuries on her neck. No visible injuries were detected on the son.

A pair of scissors was reportedly found in an alley near the building.

Police have classified the case as murder.