HONG KONG — Firefighters battled for a second day to extinguish a blaze at a high-rise apartment complex in Hong Kong on Thursday, as the death toll rose to 83 in one of the deadliest blazes in the city’s modern history .

Rescuers holding flashlights were going from apartment to apartment at the charred towers as thick smoke poured out from some windows at the Wang Fuk Court complex, a dense cluster of buildings housing thousands of people in Tai Po district, a northern suburb near Hong Kong’s border with the mainland.

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