Several people were trapped inside, public broadcaster RTHK reported, citing police, while two people have suffered serious burns, it said.
Some fire services staff have also been injured, while trying to put out the massive flames.
The city’s government told AFP that four people have died.
“Four people are certified dead, two are in critical condition and one in stable condition” as at 5pm, according to a representative from the government’s Information Services Department.
The fire department said it received reports at 2.51pm local time that a fire had broken out in Wang Fuk Court in Tai Po. It was upgraded to a No. 4 alarm, the second highest, at 3.34pm.
Wang Fuk Court is a housing complex made up of eight blocks, providing close to 2,000 residential units. Several towers around the blazing tower have bamboo scaffolding on their exterior.
