Hong Kong firefighters brought under control on Thursday a huge blaze in an apartment complex that killed at least 65 people and left nearly 300 missing, while police said a “grossly negligent” construction firm using unsafe materials may have caused the fire.

Rescuers battled intense heat and thick smoke for more than a day after the blaze erupted, as they fought to reach residents feared trapped on the upper floors of the Wang Fuk Court housing complex in the northern district of Tai Po.

The Hospital Authority in Hong Kong confirmed an updated toll of 65 dead and 70 injured as of late on Thursday.

Responding to Hong Kong’s deadliest fire in 77 years, its leader John Lee said the government would set up a HK$300million ($38.6 million) fund to help residents.

Chinese companies and groups announced donations to the fire victims, including automakers Xiaomi, Xpeng and Geely, as well as the charity foundation of Alibaba’s founder Jack Ma and Tencent.

The eight blocks of the tightly packed complex have 2 000 apartments home to more than 4 600 people in the financial hub, which is struggling to overcome chronic shortages of affordable housing.

The apartments were under renovation and clad in bamboo scaffolding and green mesh.

A distraught woman carrying her daughter’s graduation photograph searched for her child outside a shelter, one of eight that authorities said are sheltering 900 residents.

“She and her father are still not out yet,” sobbed the 52-year-old, who gave only her surname, Ng. “They didn’t have water to save our building.”

On Thursday, police officers searched the building maintenance company responsible for the housing estate, seizing related documents.

The government identified the registered contractor for the complex as Prestige Construction and Engineering Company Limited. Prestige did not answer repeated calls for comment.

Police seized bidding documents, a list of employees, 14 computers and three mobile phones during Thursday’s raid of the Prestige office, the government added.