A fire at a flat in Pak Tin Estate in Shek Kip Mei has killed one person and injured 11 others, with firefighters saying they heard reports that there was a dispute before the blaze.
The fire broke out at about 2:30am and was put out about 30 minutes later.
A man died after jumping from the building, while most of those injured felt unwell after inhaling smoke.
About 600 people were evacuated.