Hong Kong. Hong Kong firefighters combed through a high-rise apartment complex apartment-by-apartment Friday in a final attempt to find anyone alive after a massive fire engulfed seven of eight towers, killing at least 94 people in one of the city's deadliest blazes.

Crews were prioritizing apartments from which they received more than two dozen calls for assistance during the blaze, but were unable to reach, Wong Ka Wing, a deputy director of Hong Kong Fire Services, told reporters early Friday morning.

“Our firefighting operation is almost complete,” he said.

The fire started midafternoon Wednesday in one of the Wang Fuk Court complex's eight towers, jumping rapidly from one to the next as bamboo scaffolding covered in netting in place for renovations caught ablaze until seven buildings were engulfed.

It took more than 1,000 firefighters some 24 hours to bring the five-alarm blaze under control, and even nearly two days later, smoke continued to drift out of the charred skeletons of the buildings from the occasional flare-up.

The final search of the buildings was expected to be completed later Friday morning, at which point officials have said they will officially end the rescue phase of their operation at the complex in Tai Po district, a northern suburb near Hong Kong’s border with mainland China.

It was unclear how many people could possibly be inside the buildings, which had almost 2,000 apartments and some 4,800 residents. Hong Kong leader John Lee said early Thursday morning that officials had not been able to make contact with 279 residents.

“We will endeavor to force entry into all the units of the seven blocks concerned so as to ensure that there is no other possible casualties,” Wong said.

He said an updated figure on the number of missing people cannot be calculated until the search and rescue operation is complete.

The apartments from which a total of 25 unanswered rescue calls were received, which are being prioritized, were on higher floors, where the fire was last to be extinguished, he said.

More than 70 people were injured in the blaze, including 11 firefighters, and about 900 people were housed in temporary shelters.

Most of the casualties were in the first two buildings to catch fire, Wong said.

The apartment complex housed many older people. It was built in the 1980s and had been undergoing a major renovation. Hong Kong’s anti-corruption agency said on Thursday it was investigating possible corruption relating to the renovation project.

Three men, the directors and an engineering consultant of a construction company, have been arrested on suspicion of manslaughter, and police said company leaders were suspected of gross negligence.

Police have not identified the company where the suspects worked, but The Associated Press confirmed Prestige Construction & Engineering Company was in charge of renovations in the tower complex. Police have seized boxes of documents from the company, where phones rang unanswered on Thursday.

Authorities suspected that some materials on the exterior walls of the high-rise buildings did not meet fire resistance standards, allowing the unusually fast spread of the fire.

Police also said they found plastic foam panels — which are highly flammable — attached to the windows on each floor near the elevator lobby of the one unaffected tower. The panels were believed to have been installed by the construction company, but the purpose was not clear.

Authorities planned immediate inspections of housing estates undergoing major renovations to ensure scaffolding and construction materials meet safety standards.

The fire was the deadliest in Hong Kong in decades. A 1996 fire in a commercial building in Kowloon killed 41 people.

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