(CNN) At least 67 people have been killed and 40 injured after a fire tore through apartment buildings and chemical warehouses in a historic part of the Bangladesh capital Dhaka, according to Mohammed Nurul Islam, a senior official with the Home Affairs Ministry.

The latest such deadly blaze in the south Asian nation broke out Wednesday at 10:30 p.m. local time (11:30 a.m. ET) in Dhaka's Chawkbazar area, a district in old Dhaka with sprawling narrow streets and densely-packed buildings.

Police and fire officials revised down the death toll to 67 on Friday down from 78 on Thursday. Rasem Shikdar, officer with the Bangladesh Fire Service and Civil Defense, said there were "around 40 people" injured in the fire.

Inspector Morad Dul Islam with the Chawkbazar police said 45 bodies have been identified.

Throughout the night, firefighters battled the blaze, which is believed to have started when a fuel cylinder stored in a car exploded.

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