The authorities said flammable netting and foam boards may have fueled the city’s deadliest blaze in nearly 80 years, killing more than 90 and prompting arrests.

The authorities said flammable netting and foam boards may have fueled the city’s deadliest blaze in nearly 70 years, killing 55 and prompting arrests.

The authorities said flammable netting and foam boards may have fueled the city’s deadliest blaze in nearly 70 years, killing 55 and prompting arrests.