New Delhi, Nov. 27 -- At least 65 people were killed and around 300 are still missing after the deadliest fire in Hong Kong in over seven decades on Tuesday. So far, three people from a construction firm have been arrested.

Police have said that the inferno could have been caused by the use of unsafe materials by a 'grossly negligent' construction firm.

The fire broke out in the Wang Fuk Court housing complex in the northern district of Tai Po. It is one of many high-rise housing complexes in Hong Kong. The eight blocks of the tightly packed complex, which houses over 4,600 people, have 2,000 apartments.

According to property agency websites, the complex, which has been occupied since 1983, is under the government's subsidised home own...