Firefighters in Hong Kong have been battling a deadly blaze at a high-rise apartment complex for a second day.

The authorities said flammable netting and foam boards may have fueled the city’s deadliest blaze in nearly 70 years, killing at least 75 and prompting arrests.

While the exact cause of the deadly inferno that swept across a Hong Kong apartment complex remains unknown, questions have been raised about the role of the bamboo scaffolding that enveloped the buildings at the time of the fire.

Vantor’s before-and-after satellite images show the massive destruction at Hong Kong’s Wang Fuk Court complex following the city’s deadliest fire in decades.