Firefighters said on Thursday that they were battling a fire which broke out at Wang Lung Tsuen in Tsuen Wan just after 4am.
They said the fire started at 4.11am, and was upgraded to a No. 3 alarm at 4.39am.
They said they were using two jets and two breathing apparatus teams to fight the blaze.
They said no casualties have been reported so far.
They advised any members of the public who are by the smoke and fumes from the fire to close their doors and windows and stay calm.