The Vatican has sent a telegram to the Bishop of Hong Kong on behalf of Pope Leo, addressing his condolences for the victims of the fire.
"He sends the assurance of his spiritual solidarity to all those suffering from the effects of this calamity," it reads.
The telegram, signed by state secretary Cardinal Pietro Parolin, says the Pope offers prayers to emergency workers and to those who are still missing.
The death toll has risen to 75 people, local media and the AFP news agency cite the Hong Kong fire department as saying.
At least 75 people have been killed and 76 injured after a huge fire engulfed a high-rise public housing complex in Hong Kong - nearly 300 are missing.
The blaze, which tore through seven of eight tower blocks in Tai Po district on Wednesday, is now "basically under control", Hong Kong's leader says.
One resident says: "All our belongings were in this apartment, and now that it has all burned like this - what's left?".
It's unclear how many were inside the complex, which is home to around 4,600 residents, according most recent census figures.
Questions are turning to how the blaze started - BBC Verify analyses footage of the initial stages.
Two videos posted on the social media platform Threads show the initial stages of yesterday’s deadly tower block fire.
By matching fence lines, trees and exterior walls with Google street-level images of Wang Fuk Court, we’ve confirmed the clips were filmed near an entrance of Wang Cheong House, the easternmost block in the complex.
We know they show the beginning of the fire because a video filmed later from farther away, shows only Wang Cheong House burning.
The fire then spread to six other Wang Fuk Court blocks. This also matches the account from the deputy director of Hong Kong Fire Services, Derek Armstrong Chan, who told reporters the blaze started at Wang Cheong House.
Police say the materials on the outside of the building were not fireproof. Three construction company executives have been arrested on suspicion of manslaughter.
As the latest update puts the death toll at 75 people, many residents are settling in for their second night without a home.
The still-smouldering outline of the high-rise complex looms over the area, donations of food, clothing and money continue to pour in, while investigations into the cause of the blaze continue.
